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Finding the Fourth Proportional to 318,994.38, 478,554.48 and 91,292.13

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Solution

The fourth proportional to 318,994.38, 478,554.48 and 91,292.13 is: 136,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,994.38 : 478,554.48 = 91,292.13 : x
  2. Step 2: Convert to fraction form
    318,994.38/478,554.48 = 91,292.13/x
  3. Step 3: Cross multiply
    318,994.38x = 478,554.48 × 91,292.13
  4. Step 4: Simplify right side
    318,994.38x = 43,688,257,800.24
  5. Step 5: Solve for x
    x = 43,688,257,800.24/318,994.38
  6. Step 6: Final answer
    x = 136,956.20

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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.