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Finding the Fourth Proportional to 708,922.17, 978,302.03 and 386,631.59

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Solution

The fourth proportional to 708,922.17, 978,302.03 and 386,631.59 is: 533,545.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,922.17 : 978,302.03 = 386,631.59 : x
  2. Step 2: Convert to fraction form
    708,922.17/978,302.03 = 386,631.59/x
  3. Step 3: Cross multiply
    708,922.17x = 978,302.03 × 386,631.59
  4. Step 4: Simplify right side
    708,922.17x = 378,242,462,534.46
  5. Step 5: Solve for x
    x = 378,242,462,534.46/708,922.17
  6. Step 6: Final answer
    x = 533,545.82

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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.