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Finding the Fourth Proportional to 645,888.98, 891,246.56 and 359,388.74

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Solution

The fourth proportional to 645,888.98, 891,246.56 and 359,388.74 is: 495,911.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,888.98 : 891,246.56 = 359,388.74 : x
  2. Step 2: Convert to fraction form
    645,888.98/891,246.56 = 359,388.74/x
  3. Step 3: Cross multiply
    645,888.98x = 891,246.56 × 359,388.74
  4. Step 4: Simplify right side
    645,888.98x = 320,303,978,227.73
  5. Step 5: Solve for x
    x = 320,303,978,227.73/645,888.98
  6. Step 6: Final answer
    x = 495,911.82

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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.