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Finding the Fourth Proportional to 318,881.71, 478,381.42 and 131,907.79

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Solution

The fourth proportional to 318,881.71, 478,381.42 and 131,907.79 is: 197,886.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,881.71 : 478,381.42 = 131,907.79 : x
  2. Step 2: Convert to fraction form
    318,881.71/478,381.42 = 131,907.79/x
  3. Step 3: Cross multiply
    318,881.71x = 478,381.42 × 131,907.79
  4. Step 4: Simplify right side
    318,881.71x = 63,102,233,497.35
  5. Step 5: Solve for x
    x = 63,102,233,497.35/318,881.71
  6. Step 6: Final answer
    x = 197,886.03

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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.