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Finding the Fourth Proportional to 665,325.81, 918,148.91 and 359,402.13

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Solution

The fourth proportional to 665,325.81, 918,148.91 and 359,402.13 is: 495,974.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,325.81 : 918,148.91 = 359,402.13 : x
  2. Step 2: Convert to fraction form
    665,325.81/918,148.91 = 359,402.13/x
  3. Step 3: Cross multiply
    665,325.81x = 918,148.91 × 359,402.13
  4. Step 4: Simplify right side
    665,325.81x = 329,984,672,114.17
  5. Step 5: Solve for x
    x = 329,984,672,114.17/665,325.81
  6. Step 6: Final answer
    x = 495,974.55

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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.