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Finding the Fourth Proportional to 328,317.64, 492,476.40 and 78,999.64

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Solution

The fourth proportional to 328,317.64, 492,476.40 and 78,999.64 is: 118,499.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,317.64 : 492,476.40 = 78,999.64 : x
  2. Step 2: Convert to fraction form
    328,317.64/492,476.40 = 78,999.64/x
  3. Step 3: Cross multiply
    328,317.64x = 492,476.40 × 78,999.64
  4. Step 4: Simplify right side
    328,317.64x = 38,905,458,308.50
  5. Step 5: Solve for x
    x = 38,905,458,308.50/328,317.64
  6. Step 6: Final answer
    x = 118,499.45

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Half scale
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Double scale
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Similar ratio
Find fourth proportional to 492,476.46, 738,714.60 and 118,499.46
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.