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Finding the Fourth Proportional to 386,779.52, 533,779.26 and 257,494.88

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Solution

The fourth proportional to 386,779.52, 533,779.26 and 257,494.88 is: 355,358.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,779.52 : 533,779.26 = 257,494.88 : x
  2. Step 2: Convert to fraction form
    386,779.52/533,779.26 = 257,494.88/x
  3. Step 3: Cross multiply
    386,779.52x = 533,779.26 × 257,494.88
  4. Step 4: Simplify right side
    386,779.52x = 137,445,426,500.19
  5. Step 5: Solve for x
    x = 137,445,426,500.19/386,779.52
  6. Step 6: Final answer
    x = 355,358.59

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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.