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Finding the Fourth Proportional to 718,286.32, 991,205.26 and 391,592.26

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Solution

The fourth proportional to 718,286.32, 991,205.26 and 391,592.26 is: 540,381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,286.32 : 991,205.26 = 391,592.26 : x
  2. Step 2: Convert to fraction form
    718,286.32/991,205.26 = 391,592.26/x
  3. Step 3: Cross multiply
    718,286.32x = 991,205.26 × 391,592.26
  4. Step 4: Simplify right side
    718,286.32x = 388,148,307,887.29
  5. Step 5: Solve for x
    x = 388,148,307,887.29/718,286.32
  6. Step 6: Final answer
    x = 540,381.04

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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.