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Finding the Fourth Proportional to 660,715.38, 991,073.10 and 286,738.38

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Solution

The fourth proportional to 660,715.38, 991,073.10 and 286,738.38 is: 430,107.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,715.38 : 991,073.10 = 286,738.38 : x
  2. Step 2: Convert to fraction form
    660,715.38/991,073.10 = 286,738.38/x
  3. Step 3: Cross multiply
    660,715.38x = 991,073.10 × 286,738.38
  4. Step 4: Simplify right side
    660,715.38x = 284,178,695,155.58
  5. Step 5: Solve for x
    x = 284,178,695,155.58/660,715.38
  6. Step 6: Final answer
    x = 430,107.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.