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Finding the Fourth Proportional to 687,869.32, 949,259.65 and 386,063.32

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Solution

The fourth proportional to 687,869.32, 949,259.65 and 386,063.32 is: 532,767.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,869.32 : 949,259.65 = 386,063.32 : x
  2. Step 2: Convert to fraction form
    687,869.32/949,259.65 = 386,063.32/x
  3. Step 3: Cross multiply
    687,869.32x = 949,259.65 × 386,063.32
  4. Step 4: Simplify right side
    687,869.32x = 366,474,327,274.74
  5. Step 5: Solve for x
    x = 366,474,327,274.74/687,869.32
  6. Step 6: Final answer
    x = 532,767.37

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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.