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Finding the Fourth Proportional to 290,412.60, 435,618.90 and 243,756.60

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Solution

The fourth proportional to 290,412.60, 435,618.90 and 243,756.60 is: 365,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,412.60 : 435,618.90 = 243,756.60 : x
  2. Step 2: Convert to fraction form
    290,412.60/435,618.90 = 243,756.60/x
  3. Step 3: Cross multiply
    290,412.60x = 435,618.90 × 243,756.60
  4. Step 4: Simplify right side
    290,412.60x = 106,184,981,959.74
  5. Step 5: Solve for x
    x = 106,184,981,959.74/290,412.60
  6. Step 6: Final answer
    x = 365,634.90

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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.