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Finding the Fourth Proportional to 710,861.38, 980,988.75 and 388,572.76

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Solution

The fourth proportional to 710,861.38, 980,988.75 and 388,572.76 is: 536,230.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,861.38 : 980,988.75 = 388,572.76 : x
  2. Step 2: Convert to fraction form
    710,861.38/980,988.75 = 388,572.76/x
  3. Step 3: Cross multiply
    710,861.38x = 980,988.75 × 388,572.76
  4. Step 4: Simplify right side
    710,861.38x = 381,185,506,116.45
  5. Step 5: Solve for x
    x = 381,185,506,116.45/710,861.38
  6. Step 6: Final answer
    x = 536,230.43

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1.5x scale

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.