Home / 870,476.27-1,306,083.42-421,531.64

Finding the Fourth Proportional to 870,476.27, 1,306,083.42 and 421,531.64

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Solution

The fourth proportional to 870,476.27, 1,306,083.42 and 421,531.64 is: 632,476.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,476.27 : 1,306,083.42 = 421,531.64 : x
  2. Step 2: Convert to fraction form
    870,476.27/1,306,083.42 = 421,531.64/x
  3. Step 3: Cross multiply
    870,476.27x = 1,306,083.42 × 421,531.64
  4. Step 4: Simplify right side
    870,476.27x = 550,555,479,478.99
  5. Step 5: Solve for x
    x = 550,555,479,478.99/870,476.27
  6. Step 6: Final answer
    x = 632,476.15

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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.