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Finding the Fourth Proportional to 661,131.66, 912,367.71 and 359,326.38

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Solution

The fourth proportional to 661,131.66, 912,367.71 and 359,326.38 is: 495,873.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,131.66 : 912,367.71 = 359,326.38 : x
  2. Step 2: Convert to fraction form
    661,131.66/912,367.71 = 359,326.38/x
  3. Step 3: Cross multiply
    661,131.66x = 912,367.71 × 359,326.38
  4. Step 4: Simplify right side
    661,131.66x = 327,837,786,463.19
  5. Step 5: Solve for x
    x = 327,837,786,463.19/661,131.66
  6. Step 6: Final answer
    x = 495,873.68

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1.5x scale

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.