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Finding the Fourth Proportional to 776.18, 1,158.22 and 707.18

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Solution

The fourth proportional to 776.18, 1,158.22 and 707.18 is: 1,055.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.18 : 1,158.22 = 707.18 : x
  2. Step 2: Convert to fraction form
    776.18/1,158.22 = 707.18/x
  3. Step 3: Cross multiply
    776.18x = 1,158.22 × 707.18
  4. Step 4: Simplify right side
    776.18x = 819,070.02
  5. Step 5: Solve for x
    x = 819,070.02/776.18
  6. Step 6: Final answer
    x = 1,055.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.