Home / 520,721.42-777,621.60-515,084.90

Finding the Fourth Proportional to 520,721.42, 777,621.60 and 515,084.90

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Solution

The fourth proportional to 520,721.42, 777,621.60 and 515,084.90 is: 769,204.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,721.42 : 777,621.60 = 515,084.90 : x
  2. Step 2: Convert to fraction form
    520,721.42/777,621.60 = 515,084.90/x
  3. Step 3: Cross multiply
    520,721.42x = 777,621.60 × 515,084.90
  4. Step 4: Simplify right side
    520,721.42x = 400,541,144,073.84
  5. Step 5: Solve for x
    x = 400,541,144,073.84/520,721.42
  6. Step 6: Final answer
    x = 769,204.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.