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Finding the Fourth Proportional to 518,703.36, 777,400.56 and 278,220.84

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Solution

The fourth proportional to 518,703.36, 777,400.56 and 278,220.84 is: 416,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,703.36 : 777,400.56 = 278,220.84 : x
  2. Step 2: Convert to fraction form
    518,703.36/777,400.56 = 278,220.84/x
  3. Step 3: Cross multiply
    518,703.36x = 777,400.56 × 278,220.84
  4. Step 4: Simplify right side
    518,703.36x = 216,289,036,819.67
  5. Step 5: Solve for x
    x = 216,289,036,819.67/518,703.36
  6. Step 6: Final answer
    x = 416,980.21

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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.