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Finding the Fourth Proportional to 328,543.70, 492,815.55 and 91,904.90

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Solution

The fourth proportional to 328,543.70, 492,815.55 and 91,904.90 is: 137,857.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,543.70 : 492,815.55 = 91,904.90 : x
  2. Step 2: Convert to fraction form
    328,543.70/492,815.55 = 91,904.90/x
  3. Step 3: Cross multiply
    328,543.70x = 492,815.55 × 91,904.90
  4. Step 4: Simplify right side
    328,543.70x = 45,292,163,841.20
  5. Step 5: Solve for x
    x = 45,292,163,841.20/328,543.70
  6. Step 6: Final answer
    x = 137,857.35

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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.