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Finding the Fourth Proportional to 661,478.40, 992,215.68 and 181,706.64

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Solution

The fourth proportional to 661,478.40, 992,215.68 and 181,706.64 is: 272,559.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,478.40 : 992,215.68 = 181,706.64 : x
  2. Step 2: Convert to fraction form
    661,478.40/992,215.68 = 181,706.64/x
  3. Step 3: Cross multiply
    661,478.40x = 992,215.68 × 181,706.64
  4. Step 4: Simplify right side
    661,478.40x = 180,292,177,368.12
  5. Step 5: Solve for x
    x = 180,292,177,368.12/661,478.40
  6. Step 6: Final answer
    x = 272,559.43

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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.