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Finding the Fourth Proportional to 290,519.28, 435,795.28 and 103,530.76

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Solution

The fourth proportional to 290,519.28, 435,795.28 and 103,530.76 is: 155,301.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,519.28 : 435,795.28 = 103,530.76 : x
  2. Step 2: Convert to fraction form
    290,519.28/435,795.28 = 103,530.76/x
  3. Step 3: Cross multiply
    290,519.28x = 435,795.28 × 103,530.76
  4. Step 4: Simplify right side
    290,519.28x = 45,118,216,542.81
  5. Step 5: Solve for x
    x = 45,118,216,542.81/290,519.28
  6. Step 6: Final answer
    x = 155,301.97

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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.