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Finding the Fourth Proportional to 253,873.58, 380,829.54 and 85,394.40

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Solution

The fourth proportional to 253,873.58, 380,829.54 and 85,394.40 is: 128,098.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,873.58 : 380,829.54 = 85,394.40 : x
  2. Step 2: Convert to fraction form
    253,873.58/380,829.54 = 85,394.40/x
  3. Step 3: Cross multiply
    253,873.58x = 380,829.54 × 85,394.40
  4. Step 4: Simplify right side
    253,873.58x = 32,520,710,070.58
  5. Step 5: Solve for x
    x = 32,520,710,070.58/253,873.58
  6. Step 6: Final answer
    x = 128,098.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.