Home / 442,975.20-664,462.80-390,487.20

Finding the Fourth Proportional to 442,975.20, 664,462.80 and 390,487.20

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Solution

The fourth proportional to 442,975.20, 664,462.80 and 390,487.20 is: 585,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,975.20 : 664,462.80 = 390,487.20 : x
  2. Step 2: Convert to fraction form
    442,975.20/664,462.80 = 390,487.20/x
  3. Step 3: Cross multiply
    442,975.20x = 664,462.80 × 390,487.20
  4. Step 4: Simplify right side
    442,975.20x = 259,464,218,276.16
  5. Step 5: Solve for x
    x = 259,464,218,276.16/442,975.20
  6. Step 6: Final answer
    x = 585,730.80

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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.