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Finding the Fourth Proportional to 717.59, 1,075.16 and 561.35

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Solution

The fourth proportional to 717.59, 1,075.16 and 561.35 is: 841.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.59 : 1,075.16 = 561.35 : x
  2. Step 2: Convert to fraction form
    717.59/1,075.16 = 561.35/x
  3. Step 3: Cross multiply
    717.59x = 1,075.16 × 561.35
  4. Step 4: Simplify right side
    717.59x = 603,543.35
  5. Step 5: Solve for x
    x = 603,543.35/717.59
  6. Step 6: Final answer
    x = 841.07

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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.