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Finding the Fourth Proportional to 661,047.20, 912,225.36 and 359,241.76

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Solution

The fourth proportional to 661,047.20, 912,225.36 and 359,241.76 is: 495,742.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,047.20 : 912,225.36 = 359,241.76 : x
  2. Step 2: Convert to fraction form
    661,047.20/912,225.36 = 359,241.76/x
  3. Step 3: Cross multiply
    661,047.20x = 912,225.36 × 359,241.76
  4. Step 4: Simplify right side
    661,047.20x = 327,709,443,843.03
  5. Step 5: Solve for x
    x = 327,709,443,843.03/661,047.20
  6. Step 6: Final answer
    x = 495,742.88

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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.