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Finding the Fourth Proportional to 714,415.38, 985,857.51 and 424,039.56

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Solution

The fourth proportional to 714,415.38, 985,857.51 and 424,039.56 is: 585,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,415.38 : 985,857.51 = 424,039.56 : x
  2. Step 2: Convert to fraction form
    714,415.38/985,857.51 = 424,039.56/x
  3. Step 3: Cross multiply
    714,415.38x = 985,857.51 × 424,039.56
  4. Step 4: Simplify right side
    714,415.38x = 418,042,584,763.10
  5. Step 5: Solve for x
    x = 418,042,584,763.10/714,415.38
  6. Step 6: Final answer
    x = 585,153.39

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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.