Home / 747,812.40-1,121,718.60-665,143.80

Finding the Fourth Proportional to 747,812.40, 1,121,718.60 and 665,143.80

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Solution

The fourth proportional to 747,812.40, 1,121,718.60 and 665,143.80 is: 997,715.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,812.40 : 1,121,718.60 = 665,143.80 : x
  2. Step 2: Convert to fraction form
    747,812.40/1,121,718.60 = 665,143.80/x
  3. Step 3: Cross multiply
    747,812.40x = 1,121,718.60 × 665,143.80
  4. Step 4: Simplify right side
    747,812.40x = 746,104,172,134.68
  5. Step 5: Solve for x
    x = 746,104,172,134.68/747,812.40
  6. Step 6: Final answer
    x = 997,715.70

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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.