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Finding the Fourth Proportional to 290,240.79, 435,345.81 and 90,538.29

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Solution

The fourth proportional to 290,240.79, 435,345.81 and 90,538.29 is: 135,802.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,240.79 : 435,345.81 = 90,538.29 : x
  2. Step 2: Convert to fraction form
    290,240.79/435,345.81 = 90,538.29/x
  3. Step 3: Cross multiply
    290,240.79x = 435,345.81 × 90,538.29
  4. Step 4: Simplify right side
    290,240.79x = 39,415,464,856.55
  5. Step 5: Solve for x
    x = 39,415,464,856.55/290,240.79
  6. Step 6: Final answer
    x = 135,802.64

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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.