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Finding the Fourth Proportional to 657,988.20, 988,019.10 and 378,052.20

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Solution

The fourth proportional to 657,988.20, 988,019.10 and 378,052.20 is: 567,674.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,988.20 : 988,019.10 = 378,052.20 : x
  2. Step 2: Convert to fraction form
    657,988.20/988,019.10 = 378,052.20/x
  3. Step 3: Cross multiply
    657,988.20x = 988,019.10 × 378,052.20
  4. Step 4: Simplify right side
    657,988.20x = 373,522,794,397.02
  5. Step 5: Solve for x
    x = 373,522,794,397.02/657,988.20
  6. Step 6: Final answer
    x = 567,674.00

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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.