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Finding the Fourth Proportional to 708,672.60, 977,972.61 and 386,388.06

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Solution

The fourth proportional to 708,672.60, 977,972.61 and 386,388.06 is: 533,217.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,672.60 : 977,972.61 = 386,388.06 : x
  2. Step 2: Convert to fraction form
    708,672.60/977,972.61 = 386,388.06/x
  3. Step 3: Cross multiply
    708,672.60x = 977,972.61 × 386,388.06
  4. Step 4: Simplify right side
    708,672.60x = 377,876,939,511.04
  5. Step 5: Solve for x
    x = 377,876,939,511.04/708,672.60
  6. Step 6: Final answer
    x = 533,217.93

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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.