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Finding the Fourth Proportional to 399,779.55, 551,642.46 and 256,733.34

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Solution

The fourth proportional to 399,779.55, 551,642.46 and 256,733.34 is: 354,257.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,779.55 : 551,642.46 = 256,733.34 : x
  2. Step 2: Convert to fraction form
    399,779.55/551,642.46 = 256,733.34/x
  3. Step 3: Cross multiply
    399,779.55x = 551,642.46 × 256,733.34
  4. Step 4: Simplify right side
    399,779.55x = 141,625,011,241.62
  5. Step 5: Solve for x
    x = 141,625,011,241.62/399,779.55
  6. Step 6: Final answer
    x = 354,257.77

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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.