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Finding the Fourth Proportional to 290,462.10, 435,693.15 and 103,479.70

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Solution

The fourth proportional to 290,462.10, 435,693.15 and 103,479.70 is: 155,219.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,462.10 : 435,693.15 = 103,479.70 : x
  2. Step 2: Convert to fraction form
    290,462.10/435,693.15 = 103,479.70/x
  3. Step 3: Cross multiply
    290,462.10x = 435,693.15 × 103,479.70
  4. Step 4: Simplify right side
    290,462.10x = 45,085,396,454.06
  5. Step 5: Solve for x
    x = 45,085,396,454.06/290,462.10
  6. Step 6: Final answer
    x = 155,219.55

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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.