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Finding the Fourth Proportional to 518,238.58, 775,602.12 and 318,685.36

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Solution

The fourth proportional to 518,238.58, 775,602.12 and 318,685.36 is: 476,948.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,238.58 : 775,602.12 = 318,685.36 : x
  2. Step 2: Convert to fraction form
    518,238.58/775,602.12 = 318,685.36/x
  3. Step 3: Cross multiply
    518,238.58x = 775,602.12 × 318,685.36
  4. Step 4: Simplify right side
    518,238.58x = 247,173,040,828.96
  5. Step 5: Solve for x
    x = 247,173,040,828.96/518,238.58
  6. Step 6: Final answer
    x = 476,948.36

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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.