Home / 1,312.32-1,966.08-900.12

Finding the Fourth Proportional to 1,312.32, 1,966.08 and 900.12

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Solution

The fourth proportional to 1,312.32, 1,966.08 and 900.12 is: 1,348.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.32 : 1,966.08 = 900.12 : x
  2. Step 2: Convert to fraction form
    1,312.32/1,966.08 = 900.12/x
  3. Step 3: Cross multiply
    1,312.32x = 1,966.08 × 900.12
  4. Step 4: Simplify right side
    1,312.32x = 1,769,707.93
  5. Step 5: Solve for x
    x = 1,769,707.93/1,312.32
  6. Step 6: Final answer
    x = 1,348.53

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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.