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Finding the Fourth Proportional to 290,314.71, 435,472.11 and 90,652.20

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Solution

The fourth proportional to 290,314.71, 435,472.11 and 90,652.20 is: 135,978.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,314.71 : 435,472.11 = 90,652.20 : x
  2. Step 2: Convert to fraction form
    290,314.71/435,472.11 = 90,652.20/x
  3. Step 3: Cross multiply
    290,314.71x = 435,472.11 × 90,652.20
  4. Step 4: Simplify right side
    290,314.71x = 39,476,504,810.14
  5. Step 5: Solve for x
    x = 39,476,504,810.14/290,314.71
  6. Step 6: Final answer
    x = 135,978.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.