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Finding the Fourth Proportional to 521,085.43, 719,120.37 and 288,512.37

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Solution

The fourth proportional to 521,085.43, 719,120.37 and 288,512.37 is: 398,159.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,085.43 : 719,120.37 = 288,512.37 : x
  2. Step 2: Convert to fraction form
    521,085.43/719,120.37 = 288,512.37/x
  3. Step 3: Cross multiply
    521,085.43x = 719,120.37 × 288,512.37
  4. Step 4: Simplify right side
    521,085.43x = 207,475,117,225.81
  5. Step 5: Solve for x
    x = 207,475,117,225.81/521,085.43
  6. Step 6: Final answer
    x = 398,159.51

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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.