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Finding the Fourth Proportional to 518,311.30, 715,327.69 and 288,889.53

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Solution

The fourth proportional to 518,311.30, 715,327.69 and 288,889.53 is: 398,699.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,311.30 : 715,327.69 = 288,889.53 : x
  2. Step 2: Convert to fraction form
    518,311.30/715,327.69 = 288,889.53/x
  3. Step 3: Cross multiply
    518,311.30x = 715,327.69 × 288,889.53
  4. Step 4: Simplify right side
    518,311.30x = 206,650,681,226.18
  5. Step 5: Solve for x
    x = 206,650,681,226.18/518,311.30
  6. Step 6: Final answer
    x = 398,699.93

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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.