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Finding the Fourth Proportional to 253,618.98, 380,486.80 and 76,129.34

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Solution

The fourth proportional to 253,618.98, 380,486.80 and 76,129.34 is: 114,211.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,618.98 : 380,486.80 = 76,129.34 : x
  2. Step 2: Convert to fraction form
    253,618.98/380,486.80 = 76,129.34/x
  3. Step 3: Cross multiply
    253,618.98x = 380,486.80 × 76,129.34
  4. Step 4: Simplify right side
    253,618.98x = 28,966,208,962.71
  5. Step 5: Solve for x
    x = 28,966,208,962.71/253,618.98
  6. Step 6: Final answer
    x = 114,211.52

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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.