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Finding the Fourth Proportional to 399,219.31, 549,524.28 and 348,141.92

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Solution

The fourth proportional to 399,219.31, 549,524.28 and 348,141.92 is: 479,216.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,219.31 : 549,524.28 = 348,141.92 : x
  2. Step 2: Convert to fraction form
    399,219.31/549,524.28 = 348,141.92/x
  3. Step 3: Cross multiply
    399,219.31x = 549,524.28 × 348,141.92
  4. Step 4: Simplify right side
    399,219.31x = 191,312,441,120.34
  5. Step 5: Solve for x
    x = 191,312,441,120.34/399,219.31
  6. Step 6: Final answer
    x = 479,216.40

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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.