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Finding the Fourth Proportional to 687,875.32, 949,267.92 and 386,069.32

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Solution

The fourth proportional to 687,875.32, 949,267.92 and 386,069.32 is: 532,775.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,875.32 : 949,267.92 = 386,069.32 : x
  2. Step 2: Convert to fraction form
    687,875.32/949,267.92 = 386,069.32/x
  3. Step 3: Cross multiply
    687,875.32x = 949,267.92 × 386,069.32
  4. Step 4: Simplify right side
    687,875.32x = 366,483,220,372.21
  5. Step 5: Solve for x
    x = 366,483,220,372.21/687,875.32
  6. Step 6: Final answer
    x = 532,775.65

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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.