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Finding the Fourth Proportional to 870,819.40, 1,303,276.65 and 764,531.20

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Solution

The fourth proportional to 870,819.40, 1,303,276.65 and 764,531.20 is: 1,144,204.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,819.40 : 1,303,276.65 = 764,531.20 : x
  2. Step 2: Convert to fraction form
    870,819.40/1,303,276.65 = 764,531.20/x
  3. Step 3: Cross multiply
    870,819.40x = 1,303,276.65 × 764,531.20
  4. Step 4: Simplify right side
    870,819.40x = 996,395,661,156.48
  5. Step 5: Solve for x
    x = 996,395,661,156.48/870,819.40
  6. Step 6: Final answer
    x = 1,144,204.71

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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.