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Finding the Fourth Proportional to 318,346.13, 439,947.72 and 260,894.86

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Solution

The fourth proportional to 318,346.13, 439,947.72 and 260,894.86 is: 360,551.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,346.13 : 439,947.72 = 260,894.86 : x
  2. Step 2: Convert to fraction form
    318,346.13/439,947.72 = 260,894.86/x
  3. Step 3: Cross multiply
    318,346.13x = 439,947.72 × 260,894.86
  4. Step 4: Simplify right side
    318,346.13x = 114,780,097,716.85
  5. Step 5: Solve for x
    x = 114,780,097,716.85/318,346.13
  6. Step 6: Final answer
    x = 360,551.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.