Home / 1,386.10-1,913.39-888.76

Finding the Fourth Proportional to 1,386.10, 1,913.39 and 888.76

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Solution

The fourth proportional to 1,386.10, 1,913.39 and 888.76 is: 1,226.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.10 : 1,913.39 = 888.76 : x
  2. Step 2: Convert to fraction form
    1,386.10/1,913.39 = 888.76/x
  3. Step 3: Cross multiply
    1,386.10x = 1,913.39 × 888.76
  4. Step 4: Simplify right side
    1,386.10x = 1,700,544.50
  5. Step 5: Solve for x
    x = 1,700,544.50/1,386.10
  6. Step 6: Final answer
    x = 1,226.86

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Half scale
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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.