Home / 1,207.51-1,666.58-815.27

Finding the Fourth Proportional to 1,207.51, 1,666.58 and 815.27

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Solution

The fourth proportional to 1,207.51, 1,666.58 and 815.27 is: 1,125.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.51 : 1,666.58 = 815.27 : x
  2. Step 2: Convert to fraction form
    1,207.51/1,666.58 = 815.27/x
  3. Step 3: Cross multiply
    1,207.51x = 1,666.58 × 815.27
  4. Step 4: Simplify right side
    1,207.51x = 1,358,700.27
  5. Step 5: Solve for x
    x = 1,358,700.27/1,207.51
  6. Step 6: Final answer
    x = 1,125.21

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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.