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Finding the Fourth Proportional to 257,872.74, 386,808.57 and 145,501.98

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Solution

The fourth proportional to 257,872.74, 386,808.57 and 145,501.98 is: 218,252.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,872.74 : 386,808.57 = 145,501.98 : x
  2. Step 2: Convert to fraction form
    257,872.74/386,808.57 = 145,501.98/x
  3. Step 3: Cross multiply
    257,872.74x = 386,808.57 × 145,501.98
  4. Step 4: Simplify right side
    257,872.74x = 56,281,412,815.97
  5. Step 5: Solve for x
    x = 56,281,412,815.97/257,872.74
  6. Step 6: Final answer
    x = 218,252.67

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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.