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Finding the Fourth Proportional to 645,730.81, 891,108.51 and 359,250.82

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Solution

The fourth proportional to 645,730.81, 891,108.51 and 359,250.82 is: 495,766.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,730.81 : 891,108.51 = 359,250.82 : x
  2. Step 2: Convert to fraction form
    645,730.81/891,108.51 = 359,250.82/x
  3. Step 3: Cross multiply
    645,730.81x = 891,108.51 × 359,250.82
  4. Step 4: Simplify right side
    645,730.81x = 320,131,459,351.52
  5. Step 5: Solve for x
    x = 320,131,459,351.52/645,730.81
  6. Step 6: Final answer
    x = 495,766.12

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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.