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Finding the Fourth Proportional to 611,565.40, 917,348.10 and 521,023.60

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Solution

The fourth proportional to 611,565.40, 917,348.10 and 521,023.60 is: 781,535.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,565.40 : 917,348.10 = 521,023.60 : x
  2. Step 2: Convert to fraction form
    611,565.40/917,348.10 = 521,023.60/x
  3. Step 3: Cross multiply
    611,565.40x = 917,348.10 × 521,023.60
  4. Step 4: Simplify right side
    611,565.40x = 477,960,009,515.16
  5. Step 5: Solve for x
    x = 477,960,009,515.16/611,565.40
  6. Step 6: Final answer
    x = 781,535.40

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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.