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Finding the Fourth Proportional to 710,350.92, 980,298.72 and 388,081.89

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Solution

The fourth proportional to 710,350.92, 980,298.72 and 388,081.89 is: 535,560.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,350.92 : 980,298.72 = 388,081.89 : x
  2. Step 2: Convert to fraction form
    710,350.92/980,298.72 = 388,081.89/x
  3. Step 3: Cross multiply
    710,350.92x = 980,298.72 × 388,081.89
  4. Step 4: Simplify right side
    710,350.92x = 380,436,180,022.18
  5. Step 5: Solve for x
    x = 380,436,180,022.18/710,350.92
  6. Step 6: Final answer
    x = 535,560.90

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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.