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Finding the Fourth Proportional to 666,045.40, 996,443.70 and 578,273.80

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Solution

The fourth proportional to 666,045.40, 996,443.70 and 578,273.80 is: 865,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,045.40 : 996,443.70 = 578,273.80 : x
  2. Step 2: Convert to fraction form
    666,045.40/996,443.70 = 578,273.80/x
  3. Step 3: Cross multiply
    666,045.40x = 996,443.70 × 578,273.80
  4. Step 4: Simplify right side
    666,045.40x = 576,217,284,885.06
  5. Step 5: Solve for x
    x = 576,217,284,885.06/666,045.40
  6. Step 6: Final answer
    x = 865,132.14

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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.