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Finding the Fourth Proportional to 328,499.40, 492,749.10 and 91,841.70

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Solution

The fourth proportional to 328,499.40, 492,749.10 and 91,841.70 is: 137,762.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,499.40 : 492,749.10 = 91,841.70 : x
  2. Step 2: Convert to fraction form
    328,499.40/492,749.10 = 91,841.70/x
  3. Step 3: Cross multiply
    328,499.40x = 492,749.10 × 91,841.70
  4. Step 4: Simplify right side
    328,499.40x = 45,254,915,017.47
  5. Step 5: Solve for x
    x = 45,254,915,017.47/328,499.40
  6. Step 6: Final answer
    x = 137,762.55

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Similar ratio
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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.