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Finding the Fourth Proportional to 665,290.43, 918,101.15 and 359,366.81

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Solution

The fourth proportional to 665,290.43, 918,101.15 and 359,366.81 is: 495,926.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,290.43 : 918,101.15 = 359,366.81 : x
  2. Step 2: Convert to fraction form
    665,290.43/918,101.15 = 359,366.81/x
  3. Step 3: Cross multiply
    665,290.43x = 918,101.15 × 359,366.81
  4. Step 4: Simplify right side
    665,290.43x = 329,935,075,145.49
  5. Step 5: Solve for x
    x = 329,935,075,145.49/665,290.43
  6. Step 6: Final answer
    x = 495,926.38

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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.