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Finding the Fourth Proportional to 1,580,432, 2,180,996 and 855,279.70

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Solution

The fourth proportional to 1,580,432, 2,180,996 and 855,279.70 is: 1,180,285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580,432 : 2,180,996 = 855,279.70 : x
  2. Step 2: Convert to fraction form
    1,580,432/2,180,996 = 855,279.70/x
  3. Step 3: Cross multiply
    1,580,432x = 2,180,996 × 855,279.70
  4. Step 4: Simplify right side
    1,580,432x = 1,865,361,604,581.20
  5. Step 5: Solve for x
    x = 1,865,361,604,581.20/1,580,432
  6. Step 6: Final answer
    x = 1,180,285.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.