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Finding the Fourth Proportional to 916.26, 1,264.14 and 561.99

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Solution

The fourth proportional to 916.26, 1,264.14 and 561.99 is: 775.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.26 : 1,264.14 = 561.99 : x
  2. Step 2: Convert to fraction form
    916.26/1,264.14 = 561.99/x
  3. Step 3: Cross multiply
    916.26x = 1,264.14 × 561.99
  4. Step 4: Simplify right side
    916.26x = 710,434.04
  5. Step 5: Solve for x
    x = 710,434.04/916.26
  6. Step 6: Final answer
    x = 775.36

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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.