Home / 819,429.20-1,229,316.60-345,870.80

Finding the Fourth Proportional to 819,429.20, 1,229,316.60 and 345,870.80

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Solution

The fourth proportional to 819,429.20, 1,229,316.60 and 345,870.80 is: 518,879.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,429.20 : 1,229,316.60 = 345,870.80 : x
  2. Step 2: Convert to fraction form
    819,429.20/1,229,316.60 = 345,870.80/x
  3. Step 3: Cross multiply
    819,429.20x = 1,229,316.60 × 345,870.80
  4. Step 4: Simplify right side
    819,429.20x = 425,184,715,895.28
  5. Step 5: Solve for x
    x = 425,184,715,895.28/819,429.20
  6. Step 6: Final answer
    x = 518,879.14

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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.