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Finding the Fourth Proportional to 680,870.43, 939,651.14 and 487,296.32

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Solution

The fourth proportional to 680,870.43, 939,651.14 and 487,296.32 is: 672,504.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,870.43 : 939,651.14 = 487,296.32 : x
  2. Step 2: Convert to fraction form
    680,870.43/939,651.14 = 487,296.32/x
  3. Step 3: Cross multiply
    680,870.43x = 939,651.14 × 487,296.32
  4. Step 4: Simplify right side
    680,870.43x = 457,888,539,125.79
  5. Step 5: Solve for x
    x = 457,888,539,125.79/680,870.43
  6. Step 6: Final answer
    x = 672,504.66

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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.