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Finding the Fourth Proportional to 409,385.20, 614,077.80 and 290,412.40

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Solution

The fourth proportional to 409,385.20, 614,077.80 and 290,412.40 is: 435,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,385.20 : 614,077.80 = 290,412.40 : x
  2. Step 2: Convert to fraction form
    409,385.20/614,077.80 = 290,412.40/x
  3. Step 3: Cross multiply
    409,385.20x = 614,077.80 × 290,412.40
  4. Step 4: Simplify right side
    409,385.20x = 178,335,807,684.72
  5. Step 5: Solve for x
    x = 178,335,807,684.72/409,385.20
  6. Step 6: Final answer
    x = 435,618.60

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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.