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Finding the Fourth Proportional to 687,874.32, 949,266.54 and 386,068.32

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Solution

The fourth proportional to 687,874.32, 949,266.54 and 386,068.32 is: 532,774.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,874.32 : 949,266.54 = 386,068.32 : x
  2. Step 2: Convert to fraction form
    687,874.32/949,266.54 = 386,068.32/x
  3. Step 3: Cross multiply
    687,874.32x = 949,266.54 × 386,068.32
  4. Step 4: Simplify right side
    687,874.32x = 366,481,738,330.01
  5. Step 5: Solve for x
    x = 366,481,738,330.01/687,874.32
  6. Step 6: Final answer
    x = 532,774.27

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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.