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Finding the Fourth Proportional to 518,231.93, 775,592.15 and 318,678.71

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Solution

The fourth proportional to 518,231.93, 775,592.15 and 318,678.71 is: 476,938.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,231.93 : 775,592.15 = 318,678.71 : x
  2. Step 2: Convert to fraction form
    518,231.93/775,592.15 = 318,678.71/x
  3. Step 3: Cross multiply
    518,231.93x = 775,592.15 × 318,678.71
  4. Step 4: Simplify right side
    518,231.93x = 247,164,700,376.77
  5. Step 5: Solve for x
    x = 247,164,700,376.77/518,231.93
  6. Step 6: Final answer
    x = 476,938.39

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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.