Home / 1,207.02-1,666.22-809.31

Finding the Fourth Proportional to 1,207.02, 1,666.22 and 809.31

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Solution

The fourth proportional to 1,207.02, 1,666.22 and 809.31 is: 1,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.02 : 1,666.22 = 809.31 : x
  2. Step 2: Convert to fraction form
    1,207.02/1,666.22 = 809.31/x
  3. Step 3: Cross multiply
    1,207.02x = 1,666.22 × 809.31
  4. Step 4: Simplify right side
    1,207.02x = 1,348,488.51
  5. Step 5: Solve for x
    x = 1,348,488.51/1,207.02
  6. Step 6: Final answer
    x = 1,117.20

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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.