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Finding the Fourth Proportional to 665,290.80, 918,101.67 and 359,367.18

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Solution

The fourth proportional to 665,290.80, 918,101.67 and 359,367.18 is: 495,926.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,290.80 : 918,101.67 = 359,367.18 : x
  2. Step 2: Convert to fraction form
    665,290.80/918,101.67 = 359,367.18/x
  3. Step 3: Cross multiply
    665,290.80x = 918,101.67 × 359,367.18
  4. Step 4: Simplify right side
    665,290.80x = 329,935,603,310.68
  5. Step 5: Solve for x
    x = 329,935,603,310.68/665,290.80
  6. Step 6: Final answer
    x = 495,926.90

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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.