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Finding the Fourth Proportional to 1,005,931.20, 1,508,896.80 and 816,974.40

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Solution

The fourth proportional to 1,005,931.20, 1,508,896.80 and 816,974.40 is: 1,225,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,931.20 : 1,508,896.80 = 816,974.40 : x
  2. Step 2: Convert to fraction form
    1,005,931.20/1,508,896.80 = 816,974.40/x
  3. Step 3: Cross multiply
    1,005,931.20x = 1,508,896.80 × 816,974.40
  4. Step 4: Simplify right side
    1,005,931.20x = 1,232,730,057,841.92
  5. Step 5: Solve for x
    x = 1,232,730,057,841.92/1,005,931.20
  6. Step 6: Final answer
    x = 1,225,461.60

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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.