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Finding the Fourth Proportional to 726.98, 1,088.58 and 561.74

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Solution

The fourth proportional to 726.98, 1,088.58 and 561.74 is: 841.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.98 : 1,088.58 = 561.74 : x
  2. Step 2: Convert to fraction form
    726.98/1,088.58 = 561.74/x
  3. Step 3: Cross multiply
    726.98x = 1,088.58 × 561.74
  4. Step 4: Simplify right side
    726.98x = 611,498.93
  5. Step 5: Solve for x
    x = 611,498.93/726.98
  6. Step 6: Final answer
    x = 841.15

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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.