Home / 1,386.35-1,913.34-888.81

Finding the Fourth Proportional to 1,386.35, 1,913.34 and 888.81

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Solution

The fourth proportional to 1,386.35, 1,913.34 and 888.81 is: 1,226.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.35 : 1,913.34 = 888.81 : x
  2. Step 2: Convert to fraction form
    1,386.35/1,913.34 = 888.81/x
  3. Step 3: Cross multiply
    1,386.35x = 1,913.34 × 888.81
  4. Step 4: Simplify right side
    1,386.35x = 1,700,596.83
  5. Step 5: Solve for x
    x = 1,700,596.83/1,386.35
  6. Step 6: Final answer
    x = 1,226.67

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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.