Home / 918.03-1,267.38-707.75

Finding the Fourth Proportional to 918.03, 1,267.38 and 707.75

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Solution

The fourth proportional to 918.03, 1,267.38 and 707.75 is: 977.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.03 : 1,267.38 = 707.75 : x
  2. Step 2: Convert to fraction form
    918.03/1,267.38 = 707.75/x
  3. Step 3: Cross multiply
    918.03x = 1,267.38 × 707.75
  4. Step 4: Simplify right side
    918.03x = 896,978.32
  5. Step 5: Solve for x
    x = 896,978.32/918.03
  6. Step 6: Final answer
    x = 977.07

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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.