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Finding the Fourth Proportional to 420,497.94, 580,362.39 and 250,743

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Solution

The fourth proportional to 420,497.94, 580,362.39 and 250,743 is: 346,070.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,497.94 : 580,362.39 = 250,743 : x
  2. Step 2: Convert to fraction form
    420,497.94/580,362.39 = 250,743/x
  3. Step 3: Cross multiply
    420,497.94x = 580,362.39 × 250,743
  4. Step 4: Simplify right side
    420,497.94x = 145,521,806,755.77
  5. Step 5: Solve for x
    x = 145,521,806,755.77/420,497.94
  6. Step 6: Final answer
    x = 346,070.20

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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.