Home / 385,278.14-531,248.73-288,170.78

Finding the Fourth Proportional to 385,278.14, 531,248.73 and 288,170.78

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Solution

The fourth proportional to 385,278.14, 531,248.73 and 288,170.78 is: 397,350.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,278.14 : 531,248.73 = 288,170.78 : x
  2. Step 2: Convert to fraction form
    385,278.14/531,248.73 = 288,170.78/x
  3. Step 3: Cross multiply
    385,278.14x = 531,248.73 × 288,170.78
  4. Step 4: Simplify right side
    385,278.14x = 153,090,361,505.80
  5. Step 5: Solve for x
    x = 153,090,361,505.80/385,278.14
  6. Step 6: Final answer
    x = 397,350.25

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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.