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Finding the Fourth Proportional to 714,247, 985,672.86 and 391,987.08

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Solution

The fourth proportional to 714,247, 985,672.86 and 391,987.08 is: 540,948.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,247 : 985,672.86 = 391,987.08 : x
  2. Step 2: Convert to fraction form
    714,247/985,672.86 = 391,987.08/x
  3. Step 3: Cross multiply
    714,247x = 985,672.86 × 391,987.08
  4. Step 4: Simplify right side
    714,247x = 386,371,026,226.65
  5. Step 5: Solve for x
    x = 386,371,026,226.65/714,247
  6. Step 6: Final answer
    x = 540,948.76

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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.