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Finding the Fourth Proportional to 520,742.31, 718,590.48 and 291,259.85

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Solution

The fourth proportional to 520,742.31, 718,590.48 and 291,259.85 is: 401,919.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,742.31 : 718,590.48 = 291,259.85 : x
  2. Step 2: Convert to fraction form
    520,742.31/718,590.48 = 291,259.85/x
  3. Step 3: Cross multiply
    520,742.31x = 718,590.48 × 291,259.85
  4. Step 4: Simplify right side
    520,742.31x = 209,296,551,823.28
  5. Step 5: Solve for x
    x = 209,296,551,823.28/520,742.31
  6. Step 6: Final answer
    x = 401,919.62

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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.