Home / 665,318.72-918,139.68-359,395.04

Finding the Fourth Proportional to 665,318.72, 918,139.68 and 359,395.04

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Solution

The fourth proportional to 665,318.72, 918,139.68 and 359,395.04 is: 495,965.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,318.72 : 918,139.68 = 359,395.04 : x
  2. Step 2: Convert to fraction form
    665,318.72/918,139.68 = 359,395.04/x
  3. Step 3: Cross multiply
    665,318.72x = 918,139.68 × 359,395.04
  4. Step 4: Simplify right side
    665,318.72x = 329,974,847,019.19
  5. Step 5: Solve for x
    x = 329,974,847,019.19/665,318.72
  6. Step 6: Final answer
    x = 495,965.07

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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.