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Finding the Fourth Proportional to 865,822.80, 1,300,046.40 and 666,368.40

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Solution

The fourth proportional to 865,822.80, 1,300,046.40 and 666,368.40 is: 1,000,562.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,822.80 : 1,300,046.40 = 666,368.40 : x
  2. Step 2: Convert to fraction form
    865,822.80/1,300,046.40 = 666,368.40/x
  3. Step 3: Cross multiply
    865,822.80x = 1,300,046.40 × 666,368.40
  4. Step 4: Simplify right side
    865,822.80x = 866,309,839,493.76
  5. Step 5: Solve for x
    x = 866,309,839,493.76/865,822.80
  6. Step 6: Final answer
    x = 1,000,562.52

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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.