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Finding the Fourth Proportional to 710,326.72, 980,245.14 and 388,036.96

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Solution

The fourth proportional to 710,326.72, 980,245.14 and 388,036.96 is: 535,487.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,326.72 : 980,245.14 = 388,036.96 : x
  2. Step 2: Convert to fraction form
    710,326.72/980,245.14 = 388,036.96/x
  3. Step 3: Cross multiply
    710,326.72x = 980,245.14 × 388,036.96
  4. Step 4: Simplify right side
    710,326.72x = 380,371,344,180.37
  5. Step 5: Solve for x
    x = 380,371,344,180.37/710,326.72
  6. Step 6: Final answer
    x = 535,487.87

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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.