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Finding the Fourth Proportional to 528,028.40, 790,876.20 and 278,418.80

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Solution

The fourth proportional to 528,028.40, 790,876.20 and 278,418.80 is: 417,013.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,028.40 : 790,876.20 = 278,418.80 : x
  2. Step 2: Convert to fraction form
    528,028.40/790,876.20 = 278,418.80/x
  3. Step 3: Cross multiply
    528,028.40x = 790,876.20 × 278,418.80
  4. Step 4: Simplify right side
    528,028.40x = 220,194,802,552.56
  5. Step 5: Solve for x
    x = 220,194,802,552.56/528,028.40
  6. Step 6: Final answer
    x = 417,013.18

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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.