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Finding the Fourth Proportional to 390,205.80, 585,308.70 and 250,237.80

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Solution

The fourth proportional to 390,205.80, 585,308.70 and 250,237.80 is: 375,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,205.80 : 585,308.70 = 250,237.80 : x
  2. Step 2: Convert to fraction form
    390,205.80/585,308.70 = 250,237.80/x
  3. Step 3: Cross multiply
    390,205.80x = 585,308.70 × 250,237.80
  4. Step 4: Simplify right side
    390,205.80x = 146,466,361,408.86
  5. Step 5: Solve for x
    x = 146,466,361,408.86/390,205.80
  6. Step 6: Final answer
    x = 375,356.70

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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.