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Finding the Fourth Proportional to 710,982.36, 981,159.13 and 388,692.46

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Solution

The fourth proportional to 710,982.36, 981,159.13 and 388,692.46 is: 536,397.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,982.36 : 981,159.13 = 388,692.46 : x
  2. Step 2: Convert to fraction form
    710,982.36/981,159.13 = 388,692.46/x
  3. Step 3: Cross multiply
    710,982.36x = 981,159.13 × 388,692.46
  4. Step 4: Simplify right side
    710,982.36x = 381,369,154,037.32
  5. Step 5: Solve for x
    x = 381,369,154,037.32/710,982.36
  6. Step 6: Final answer
    x = 536,397.49

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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.