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Finding the Fourth Proportional to 520,758.34, 718,612.56 and 291,275.86

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Solution

The fourth proportional to 520,758.34, 718,612.56 and 291,275.86 is: 401,941.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,758.34 : 718,612.56 = 291,275.86 : x
  2. Step 2: Convert to fraction form
    520,758.34/718,612.56 = 291,275.86/x
  3. Step 3: Cross multiply
    520,758.34x = 718,612.56 × 291,275.86
  4. Step 4: Simplify right side
    520,758.34x = 209,314,491,420.80
  5. Step 5: Solve for x
    x = 209,314,491,420.80/520,758.34
  6. Step 6: Final answer
    x = 401,941.70

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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.