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Finding the Fourth Proportional to 290,572.80, 435,859.20 and 103,516.80

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Solution

The fourth proportional to 290,572.80, 435,859.20 and 103,516.80 is: 155,275.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,572.80 : 435,859.20 = 103,516.80 : x
  2. Step 2: Convert to fraction form
    290,572.80/435,859.20 = 103,516.80/x
  3. Step 3: Cross multiply
    290,572.80x = 435,859.20 × 103,516.80
  4. Step 4: Simplify right side
    290,572.80x = 45,118,749,634.56
  5. Step 5: Solve for x
    x = 45,118,749,634.56/290,572.80
  6. Step 6: Final answer
    x = 155,275.20

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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.