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Finding the Fourth Proportional to 290,304.60, 435,456.93 and 90,642.08

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Solution

The fourth proportional to 290,304.60, 435,456.93 and 90,642.08 is: 135,963.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,304.60 : 435,456.93 = 90,642.08 : x
  2. Step 2: Convert to fraction form
    290,304.60/435,456.93 = 90,642.08/x
  3. Step 3: Cross multiply
    290,304.60x = 435,456.93 × 90,642.08
  4. Step 4: Simplify right side
    290,304.60x = 39,470,722,974.26
  5. Step 5: Solve for x
    x = 39,470,722,974.26/290,304.60
  6. Step 6: Final answer
    x = 135,963.13

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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.