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Finding the Fourth Proportional to 502,912.80, 754,369.20 and 128,935.80

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Solution

The fourth proportional to 502,912.80, 754,369.20 and 128,935.80 is: 193,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,912.80 : 754,369.20 = 128,935.80 : x
  2. Step 2: Convert to fraction form
    502,912.80/754,369.20 = 128,935.80/x
  3. Step 3: Cross multiply
    502,912.80x = 754,369.20 × 128,935.80
  4. Step 4: Simplify right side
    502,912.80x = 97,265,196,297.36
  5. Step 5: Solve for x
    x = 97,265,196,297.36/502,912.80
  6. Step 6: Final answer
    x = 193,403.70

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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.