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Finding the Fourth Proportional to 867,005.80, 1,300,508.70 and 688,546.60

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Solution

The fourth proportional to 867,005.80, 1,300,508.70 and 688,546.60 is: 1,032,819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,005.80 : 1,300,508.70 = 688,546.60 : x
  2. Step 2: Convert to fraction form
    867,005.80/1,300,508.70 = 688,546.60/x
  3. Step 3: Cross multiply
    867,005.80x = 1,300,508.70 × 688,546.60
  4. Step 4: Simplify right side
    867,005.80x = 895,460,843,655.42
  5. Step 5: Solve for x
    x = 895,460,843,655.42/867,005.80
  6. Step 6: Final answer
    x = 1,032,819.90

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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.