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Finding the Fourth Proportional to 661,331.28, 912,708.52 and 374,820.60

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Solution

The fourth proportional to 661,331.28, 912,708.52 and 374,820.60 is: 517,292.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,331.28 : 912,708.52 = 374,820.60 : x
  2. Step 2: Convert to fraction form
    661,331.28/912,708.52 = 374,820.60/x
  3. Step 3: Cross multiply
    661,331.28x = 912,708.52 × 374,820.60
  4. Step 4: Simplify right side
    661,331.28x = 342,101,955,091.51
  5. Step 5: Solve for x
    x = 342,101,955,091.51/661,331.28
  6. Step 6: Final answer
    x = 517,292.87

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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.