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Finding the Fourth Proportional to 290,508.19, 435,778.68 and 103,519.69

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Solution

The fourth proportional to 290,508.19, 435,778.68 and 103,519.69 is: 155,285.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,508.19 : 435,778.68 = 103,519.69 : x
  2. Step 2: Convert to fraction form
    290,508.19/435,778.68 = 103,519.69/x
  3. Step 3: Cross multiply
    290,508.19x = 435,778.68 × 103,519.69
  4. Step 4: Simplify right side
    290,508.19x = 45,111,673,160.96
  5. Step 5: Solve for x
    x = 45,111,673,160.96/290,508.19
  6. Step 6: Final answer
    x = 155,285.38

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1.5x scale

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.