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Finding the Fourth Proportional to 661,021.72, 912,227.38 and 359,215.72

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Solution

The fourth proportional to 661,021.72, 912,227.38 and 359,215.72 is: 495,727.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,021.72 : 912,227.38 = 359,215.72 : x
  2. Step 2: Convert to fraction form
    661,021.72/912,227.38 = 359,215.72/x
  3. Step 3: Cross multiply
    661,021.72x = 912,227.38 × 359,215.72
  4. Step 4: Simplify right side
    661,021.72x = 327,686,415,110.41
  5. Step 5: Solve for x
    x = 327,686,415,110.41/661,021.72
  6. Step 6: Final answer
    x = 495,727.15

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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.