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Finding the Fourth Proportional to 661,275.12, 912,568.76 and 359,475.60

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Solution

The fourth proportional to 661,275.12, 912,568.76 and 359,475.60 is: 496,081.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,275.12 : 912,568.76 = 359,475.60 : x
  2. Step 2: Convert to fraction form
    661,275.12/912,568.76 = 359,475.60/x
  3. Step 3: Cross multiply
    661,275.12x = 912,568.76 × 359,475.60
  4. Step 4: Simplify right side
    661,275.12x = 328,046,202,542.26
  5. Step 5: Solve for x
    x = 328,046,202,542.26/661,275.12
  6. Step 6: Final answer
    x = 496,081.27

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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.