Home / 1,562.27-2,155.28-971.78

Finding the Fourth Proportional to 1,562.27, 2,155.28 and 971.78

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Solution

The fourth proportional to 1,562.27, 2,155.28 and 971.78 is: 1,340.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.27 : 2,155.28 = 971.78 : x
  2. Step 2: Convert to fraction form
    1,562.27/2,155.28 = 971.78/x
  3. Step 3: Cross multiply
    1,562.27x = 2,155.28 × 971.78
  4. Step 4: Simplify right side
    1,562.27x = 2,094,442.36
  5. Step 5: Solve for x
    x = 2,094,442.36/1,562.27
  6. Step 6: Final answer
    x = 1,340.64

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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.