Home / 390,945.53-539,569.38-268,337.18

Finding the Fourth Proportional to 390,945.53, 539,569.38 and 268,337.18

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Solution

The fourth proportional to 390,945.53, 539,569.38 and 268,337.18 is: 370,349.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,945.53 : 539,569.38 = 268,337.18 : x
  2. Step 2: Convert to fraction form
    390,945.53/539,569.38 = 268,337.18/x
  3. Step 3: Cross multiply
    390,945.53x = 539,569.38 × 268,337.18
  4. Step 4: Simplify right side
    390,945.53x = 144,786,525,843.55
  5. Step 5: Solve for x
    x = 144,786,525,843.55/390,945.53
  6. Step 6: Final answer
    x = 370,349.61

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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.