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Finding the Fourth Proportional to 687,933, 949,347.54 and 386,224.20

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Solution

The fourth proportional to 687,933, 949,347.54 and 386,224.20 is: 532,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,933 : 949,347.54 = 386,224.20 : x
  2. Step 2: Convert to fraction form
    687,933/949,347.54 = 386,224.20/x
  3. Step 3: Cross multiply
    687,933x = 949,347.54 × 386,224.20
  4. Step 4: Simplify right side
    687,933x = 366,660,994,158.47
  5. Step 5: Solve for x
    x = 366,660,994,158.47/687,933
  6. Step 6: Final answer
    x = 532,989.40

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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.