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Finding the Fourth Proportional to 528,048.40, 790,906.20 and 278,438.80

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Solution

The fourth proportional to 528,048.40, 790,906.20 and 278,438.80 is: 417,043.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,048.40 : 790,906.20 = 278,438.80 : x
  2. Step 2: Convert to fraction form
    528,048.40/790,906.20 = 278,438.80/x
  3. Step 3: Cross multiply
    528,048.40x = 790,906.20 × 278,438.80
  4. Step 4: Simplify right side
    528,048.40x = 220,218,973,240.56
  5. Step 5: Solve for x
    x = 220,218,973,240.56/528,048.40
  6. Step 6: Final answer
    x = 417,043.16

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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.