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Finding the Fourth Proportional to 558,970.80, 838,456.20 and 509,107.20

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Solution

The fourth proportional to 558,970.80, 838,456.20 and 509,107.20 is: 763,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,970.80 : 838,456.20 = 509,107.20 : x
  2. Step 2: Convert to fraction form
    558,970.80/838,456.20 = 509,107.20/x
  3. Step 3: Cross multiply
    558,970.80x = 838,456.20 × 509,107.20
  4. Step 4: Simplify right side
    558,970.80x = 426,864,088,304.64
  5. Step 5: Solve for x
    x = 426,864,088,304.64/558,970.80
  6. Step 6: Final answer
    x = 763,660.80

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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.