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Finding the Fourth Proportional to 256,823.60, 385,264.20 and 79,329.20

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Solution

The fourth proportional to 256,823.60, 385,264.20 and 79,329.20 is: 119,002.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,823.60 : 385,264.20 = 79,329.20 : x
  2. Step 2: Convert to fraction form
    256,823.60/385,264.20 = 79,329.20/x
  3. Step 3: Cross multiply
    256,823.60x = 385,264.20 × 79,329.20
  4. Step 4: Simplify right side
    256,823.60x = 30,562,700,774.64
  5. Step 5: Solve for x
    x = 30,562,700,774.64/256,823.60
  6. Step 6: Final answer
    x = 119,002.70

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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.