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Finding the Fourth Proportional to 561.36, 841.52 and 515.22

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Solution

The fourth proportional to 561.36, 841.52 and 515.22 is: 772.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.36 : 841.52 = 515.22 : x
  2. Step 2: Convert to fraction form
    561.36/841.52 = 515.22/x
  3. Step 3: Cross multiply
    561.36x = 841.52 × 515.22
  4. Step 4: Simplify right side
    561.36x = 433,565.36
  5. Step 5: Solve for x
    x = 433,565.36/561.36
  6. Step 6: Final answer
    x = 772.35

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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.