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Finding the Fourth Proportional to 561.20, 841.08 and 432.68

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Solution

The fourth proportional to 561.20, 841.08 and 432.68 is: 648.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.20 : 841.08 = 432.68 : x
  2. Step 2: Convert to fraction form
    561.20/841.08 = 432.68/x
  3. Step 3: Cross multiply
    561.20x = 841.08 × 432.68
  4. Step 4: Simplify right side
    561.20x = 363,918.49
  5. Step 5: Solve for x
    x = 363,918.49/561.20
  6. Step 6: Final answer
    x = 648.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.