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Finding the Fourth Proportional to 592,990.80, 819,171 and 478,100.40

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Solution

The fourth proportional to 592,990.80, 819,171 and 478,100.40 is: 660,458.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    592,990.80 : 819,171 = 478,100.40 : x
  2. Step 2: Convert to fraction form
    592,990.80/819,171 = 478,100.40/x
  3. Step 3: Cross multiply
    592,990.80x = 819,171 × 478,100.40
  4. Step 4: Simplify right side
    592,990.80x = 391,645,982,768.40
  5. Step 5: Solve for x
    x = 391,645,982,768.40/592,990.80
  6. Step 6: Final answer
    x = 660,458.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.