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Finding the Fourth Proportional to 710,857.38, 980,983.23 and 388,568.76

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Solution

The fourth proportional to 710,857.38, 980,983.23 and 388,568.76 is: 536,224.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,857.38 : 980,983.23 = 388,568.76 : x
  2. Step 2: Convert to fraction form
    710,857.38/980,983.23 = 388,568.76/x
  3. Step 3: Cross multiply
    710,857.38x = 980,983.23 × 388,568.76
  4. Step 4: Simplify right side
    710,857.38x = 381,179,437,261.90
  5. Step 5: Solve for x
    x = 381,179,437,261.90/710,857.38
  6. Step 6: Final answer
    x = 536,224.91

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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.