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Finding the Fourth Proportional to 615,300.40, 921,395.40 and 403,793.20

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Solution

The fourth proportional to 615,300.40, 921,395.40 and 403,793.20 is: 604,669.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,300.40 : 921,395.40 = 403,793.20 : x
  2. Step 2: Convert to fraction form
    615,300.40/921,395.40 = 403,793.20/x
  3. Step 3: Cross multiply
    615,300.40x = 921,395.40 × 403,793.20
  4. Step 4: Simplify right side
    615,300.40x = 372,053,197,031.28
  5. Step 5: Solve for x
    x = 372,053,197,031.28/615,300.40
  6. Step 6: Final answer
    x = 604,669.19

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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.