Home / 870,486.72-1,306,099.17-421,542.09

Finding the Fourth Proportional to 870,486.72, 1,306,099.17 and 421,542.09

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Solution

The fourth proportional to 870,486.72, 1,306,099.17 and 421,542.09 is: 632,491.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,486.72 : 1,306,099.17 = 421,542.09 : x
  2. Step 2: Convert to fraction form
    870,486.72/1,306,099.17 = 421,542.09/x
  3. Step 3: Cross multiply
    870,486.72x = 1,306,099.17 × 421,542.09
  4. Step 4: Simplify right side
    870,486.72x = 550,575,773,869.07
  5. Step 5: Solve for x
    x = 550,575,773,869.07/870,486.72
  6. Step 6: Final answer
    x = 632,491.87

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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.