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Finding the Fourth Proportional to 675,711.80, 1,013,567.70 and 665,214.20

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Solution

The fourth proportional to 675,711.80, 1,013,567.70 and 665,214.20 is: 997,821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,711.80 : 1,013,567.70 = 665,214.20 : x
  2. Step 2: Convert to fraction form
    675,711.80/1,013,567.70 = 665,214.20/x
  3. Step 3: Cross multiply
    675,711.80x = 1,013,567.70 × 665,214.20
  4. Step 4: Simplify right side
    675,711.80x = 674,239,626,701.34
  5. Step 5: Solve for x
    x = 674,239,626,701.34/675,711.80
  6. Step 6: Final answer
    x = 997,821.30

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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.