Home / 391,955,578.40-540,894,405.78-215,739,806.24

Finding the Fourth Proportional to 391,955,578.40, 540,894,405.78 and 215,739,806.24

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Solution

The fourth proportional to 391,955,578.40, 540,894,405.78 and 215,739,806.24 is: 297,718,569.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,955,578.40 : 540,894,405.78 = 215,739,806.24 : x
  2. Step 2: Convert to fraction form
    391,955,578.40/540,894,405.78 = 215,739,806.24/x
  3. Step 3: Cross multiply
    391,955,578.40x = 540,894,405.78 × 215,739,806.24
  4. Step 4: Simplify right side
    391,955,578.40x = 116,692,454,299,277,136
  5. Step 5: Solve for x
    x = 116,692,454,299,277,136/391,955,578.40
  6. Step 6: Final answer
    x = 297,718,569.99

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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.