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Finding the Fourth Proportional to 710,712.84, 980,754.12 and 388,434.12

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Solution

The fourth proportional to 710,712.84, 980,754.12 and 388,434.12 is: 536,022.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,712.84 : 980,754.12 = 388,434.12 : x
  2. Step 2: Convert to fraction form
    710,712.84/980,754.12 = 388,434.12/x
  3. Step 3: Cross multiply
    710,712.84x = 980,754.12 × 388,434.12
  4. Step 4: Simplify right side
    710,712.84x = 380,958,363,538.57
  5. Step 5: Solve for x
    x = 380,958,363,538.57/710,712.84
  6. Step 6: Final answer
    x = 536,022.91

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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.