Home / 1,562.20-2,155.85-899.05

Finding the Fourth Proportional to 1,562.20, 2,155.85 and 899.05

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Solution

The fourth proportional to 1,562.20, 2,155.85 and 899.05 is: 1,240.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.20 : 2,155.85 = 899.05 : x
  2. Step 2: Convert to fraction form
    1,562.20/2,155.85 = 899.05/x
  3. Step 3: Cross multiply
    1,562.20x = 2,155.85 × 899.05
  4. Step 4: Simplify right side
    1,562.20x = 1,938,214.47
  5. Step 5: Solve for x
    x = 1,938,214.47/1,562.20
  6. Step 6: Final answer
    x = 1,240.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.