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Finding the Fourth Proportional to 520,445.75, 718,181.88 and 291,021.95

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Solution

The fourth proportional to 520,445.75, 718,181.88 and 291,021.95 is: 401,591.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,445.75 : 718,181.88 = 291,021.95 : x
  2. Step 2: Convert to fraction form
    520,445.75/718,181.88 = 291,021.95/x
  3. Step 3: Cross multiply
    520,445.75x = 718,181.88 × 291,021.95
  4. Step 4: Simplify right side
    520,445.75x = 209,006,687,581.36
  5. Step 5: Solve for x
    x = 209,006,687,581.36/520,445.75
  6. Step 6: Final answer
    x = 401,591.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.