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Finding the Fourth Proportional to 318,782.32, 478,186.68 and 94,142.80

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Solution

The fourth proportional to 318,782.32, 478,186.68 and 94,142.80 is: 141,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,782.32 : 478,186.68 = 94,142.80 : x
  2. Step 2: Convert to fraction form
    318,782.32/478,186.68 = 94,142.80/x
  3. Step 3: Cross multiply
    318,782.32x = 478,186.68 × 94,142.80
  4. Step 4: Simplify right side
    318,782.32x = 45,017,832,977.90
  5. Step 5: Solve for x
    x = 45,017,832,977.90/318,782.32
  6. Step 6: Final answer
    x = 141,218.10

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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.