Home / 1,397.83-1,927.10-1,055.65

Finding the Fourth Proportional to 1,397.83, 1,927.10 and 1,055.65

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Solution

The fourth proportional to 1,397.83, 1,927.10 and 1,055.65 is: 1,455.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.83 : 1,927.10 = 1,055.65 : x
  2. Step 2: Convert to fraction form
    1,397.83/1,927.10 = 1,055.65/x
  3. Step 3: Cross multiply
    1,397.83x = 1,927.10 × 1,055.65
  4. Step 4: Simplify right side
    1,397.83x = 2,034,348.74
  5. Step 5: Solve for x
    x = 2,034,348.74/1,397.83
  6. Step 6: Final answer
    x = 1,455.36

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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.