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Finding the Fourth Proportional to 290,827.20, 436,240.80 and 268,082.40

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Solution

The fourth proportional to 290,827.20, 436,240.80 and 268,082.40 is: 402,123.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,827.20 : 436,240.80 = 268,082.40 : x
  2. Step 2: Convert to fraction form
    290,827.20/436,240.80 = 268,082.40/x
  3. Step 3: Cross multiply
    290,827.20x = 436,240.80 × 268,082.40
  4. Step 4: Simplify right side
    290,827.20x = 116,948,480,641.92
  5. Step 5: Solve for x
    x = 116,948,480,641.92/290,827.20
  6. Step 6: Final answer
    x = 402,123.60

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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.