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Finding the Fourth Proportional to 290,243.79, 435,350.31 and 90,541.29

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Solution

The fourth proportional to 290,243.79, 435,350.31 and 90,541.29 is: 135,807.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,243.79 : 435,350.31 = 90,541.29 : x
  2. Step 2: Convert to fraction form
    290,243.79/435,350.31 = 90,541.29/x
  3. Step 3: Cross multiply
    290,243.79x = 435,350.31 × 90,541.29
  4. Step 4: Simplify right side
    290,243.79x = 39,417,178,669.30
  5. Step 5: Solve for x
    x = 39,417,178,669.30/290,243.79
  6. Step 6: Final answer
    x = 135,807.14

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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.