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Finding the Fourth Proportional to 521,085.93, 719,121.06 and 288,512.87

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Solution

The fourth proportional to 521,085.93, 719,121.06 and 288,512.87 is: 398,160.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,085.93 : 719,121.06 = 288,512.87 : x
  2. Step 2: Convert to fraction form
    521,085.93/719,121.06 = 288,512.87/x
  3. Step 3: Cross multiply
    521,085.93x = 719,121.06 × 288,512.87
  4. Step 4: Simplify right side
    521,085.93x = 207,475,675,859.87
  5. Step 5: Solve for x
    x = 207,475,675,859.87/521,085.93
  6. Step 6: Final answer
    x = 398,160.20

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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.