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Finding the Fourth Proportional to 856,474.90, 1,181,888.81 and 474,478.90

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Solution

The fourth proportional to 856,474.90, 1,181,888.81 and 474,478.90 is: 654,755.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,474.90 : 1,181,888.81 = 474,478.90 : x
  2. Step 2: Convert to fraction form
    856,474.90/1,181,888.81 = 474,478.90/x
  3. Step 3: Cross multiply
    856,474.90x = 1,181,888.81 × 474,478.90
  4. Step 4: Simplify right side
    856,474.90x = 560,781,302,491.11
  5. Step 5: Solve for x
    x = 560,781,302,491.11/856,474.90
  6. Step 6: Final answer
    x = 654,755.09

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1.5x scale

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.