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Finding the Fourth Proportional to 636,686.34, 878,612.72 and 350,200.28

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Solution

The fourth proportional to 636,686.34, 878,612.72 and 350,200.28 is: 483,268.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,686.34 : 878,612.72 = 350,200.28 : x
  2. Step 2: Convert to fraction form
    636,686.34/878,612.72 = 350,200.28/x
  3. Step 3: Cross multiply
    636,686.34x = 878,612.72 × 350,200.28
  4. Step 4: Simplify right side
    636,686.34x = 307,690,414,411.50
  5. Step 5: Solve for x
    x = 307,690,414,411.50/636,686.34
  6. Step 6: Final answer
    x = 483,268.44

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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.