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Finding the Fourth Proportional to 625,803.40, 938,013.90 and 345,521.80

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Solution

The fourth proportional to 625,803.40, 938,013.90 and 345,521.80 is: 517,901.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,803.40 : 938,013.90 = 345,521.80 : x
  2. Step 2: Convert to fraction form
    625,803.40/938,013.90 = 345,521.80/x
  3. Step 3: Cross multiply
    625,803.40x = 938,013.90 × 345,521.80
  4. Step 4: Simplify right side
    625,803.40x = 324,104,251,153.02
  5. Step 5: Solve for x
    x = 324,104,251,153.02/625,803.40
  6. Step 6: Final answer
    x = 517,901.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.