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Finding the Fourth Proportional to 402,884.60, 604,326.90 and 378,001.40

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Solution

The fourth proportional to 402,884.60, 604,326.90 and 378,001.40 is: 567,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,884.60 : 604,326.90 = 378,001.40 : x
  2. Step 2: Convert to fraction form
    402,884.60/604,326.90 = 378,001.40/x
  3. Step 3: Cross multiply
    402,884.60x = 604,326.90 × 378,001.40
  4. Step 4: Simplify right side
    402,884.60x = 228,436,414,257.66
  5. Step 5: Solve for x
    x = 228,436,414,257.66/402,884.60
  6. Step 6: Final answer
    x = 567,002.10

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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.