Home / 1,312.26-1,810.50-1,187.52

Finding the Fourth Proportional to 1,312.26, 1,810.50 and 1,187.52

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Solution

The fourth proportional to 1,312.26, 1,810.50 and 1,187.52 is: 1,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.26 : 1,810.50 = 1,187.52 : x
  2. Step 2: Convert to fraction form
    1,312.26/1,810.50 = 1,187.52/x
  3. Step 3: Cross multiply
    1,312.26x = 1,810.50 × 1,187.52
  4. Step 4: Simplify right side
    1,312.26x = 2,150,004.96
  5. Step 5: Solve for x
    x = 2,150,004.96/1,312.26
  6. Step 6: Final answer
    x = 1,638.40

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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.