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Finding the Fourth Proportional to 638,354.32, 880,928.16 and 351,879.19

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Solution

The fourth proportional to 638,354.32, 880,928.16 and 351,879.19 is: 485,592.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,354.32 : 880,928.16 = 351,879.19 : x
  2. Step 2: Convert to fraction form
    638,354.32/880,928.16 = 351,879.19/x
  3. Step 3: Cross multiply
    638,354.32x = 880,928.16 × 351,879.19
  4. Step 4: Simplify right side
    638,354.32x = 309,980,283,867.12
  5. Step 5: Solve for x
    x = 309,980,283,867.12/638,354.32
  6. Step 6: Final answer
    x = 485,592.84

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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.