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Finding the Fourth Proportional to 708,309.77, 977,438.95 and 386,012.89

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Solution

The fourth proportional to 708,309.77, 977,438.95 and 386,012.89 is: 532,682.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,309.77 : 977,438.95 = 386,012.89 : x
  2. Step 2: Convert to fraction form
    708,309.77/977,438.95 = 386,012.89/x
  3. Step 3: Cross multiply
    708,309.77x = 977,438.95 × 386,012.89
  4. Step 4: Simplify right side
    708,309.77x = 377,304,034,144.83
  5. Step 5: Solve for x
    x = 377,304,034,144.83/708,309.77
  6. Step 6: Final answer
    x = 532,682.24

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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.