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Finding the Fourth Proportional to 615,455.40, 921,627.90 and 403,948.20

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Solution

The fourth proportional to 615,455.40, 921,627.90 and 403,948.20 is: 604,901.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,455.40 : 921,627.90 = 403,948.20 : x
  2. Step 2: Convert to fraction form
    615,455.40/921,627.90 = 403,948.20/x
  3. Step 3: Cross multiply
    615,455.40x = 921,627.90 × 403,948.20
  4. Step 4: Simplify right side
    615,455.40x = 372,289,931,274.78
  5. Step 5: Solve for x
    x = 372,289,931,274.78/615,455.40
  6. Step 6: Final answer
    x = 604,901.56

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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.