Home / 523,436,721.13-722,340,492.38-288,486,820.87

Finding the Fourth Proportional to 523,436,721.13, 722,340,492.38 and 288,486,820.87

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Solution

The fourth proportional to 523,436,721.13, 722,340,492.38 and 288,486,820.87 is: 398,110,609.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,436,721.13 : 722,340,492.38 = 288,486,820.87 : x
  2. Step 2: Convert to fraction form
    523,436,721.13/722,340,492.38 = 288,486,820.87/x
  3. Step 3: Cross multiply
    523,436,721.13x = 722,340,492.38 × 288,486,820.87
  4. Step 4: Simplify right side
    523,436,721.13x = 208,385,712,235,084,736
  5. Step 5: Solve for x
    x = 208,385,712,235,084,736/523,436,721.13
  6. Step 6: Final answer
    x = 398,110,609.79

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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.