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Finding the Fourth Proportional to 782.10, 1,173.15 and 710.10

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Solution

The fourth proportional to 782.10, 1,173.15 and 710.10 is: 1,065.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.10 : 1,173.15 = 710.10 : x
  2. Step 2: Convert to fraction form
    782.10/1,173.15 = 710.10/x
  3. Step 3: Cross multiply
    782.10x = 1,173.15 × 710.10
  4. Step 4: Simplify right side
    782.10x = 833,053.82
  5. Step 5: Solve for x
    x = 833,053.82/782.10
  6. Step 6: Final answer
    x = 1,065.15

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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.