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Finding the Fourth Proportional to 768,044.75, 1,059,838.76 and 428,505.71

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Solution

The fourth proportional to 768,044.75, 1,059,838.76 and 428,505.71 is: 591,302.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,044.75 : 1,059,838.76 = 428,505.71 : x
  2. Step 2: Convert to fraction form
    768,044.75/1,059,838.76 = 428,505.71/x
  3. Step 3: Cross multiply
    768,044.75x = 1,059,838.76 × 428,505.71
  4. Step 4: Simplify right side
    768,044.75x = 454,146,956,111.39
  5. Step 5: Solve for x
    x = 454,146,956,111.39/768,044.75
  6. Step 6: Final answer
    x = 591,302.73

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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.