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Finding the Fourth Proportional to 708,316.72, 977,448.56 and 386,019.88

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Solution

The fourth proportional to 708,316.72, 977,448.56 and 386,019.88 is: 532,691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,316.72 : 977,448.56 = 386,019.88 : x
  2. Step 2: Convert to fraction form
    708,316.72/977,448.56 = 386,019.88/x
  3. Step 3: Cross multiply
    708,316.72x = 977,448.56 × 386,019.88
  4. Step 4: Simplify right side
    708,316.72x = 377,314,575,837.37
  5. Step 5: Solve for x
    x = 377,314,575,837.37/708,316.72
  6. Step 6: Final answer
    x = 532,691.90

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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.