Home / 1,420.29-1,959.87-1,047.47

Finding the Fourth Proportional to 1,420.29, 1,959.87 and 1,047.47

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Solution

The fourth proportional to 1,420.29, 1,959.87 and 1,047.47 is: 1,445.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.29 : 1,959.87 = 1,047.47 : x
  2. Step 2: Convert to fraction form
    1,420.29/1,959.87 = 1,047.47/x
  3. Step 3: Cross multiply
    1,420.29x = 1,959.87 × 1,047.47
  4. Step 4: Simplify right side
    1,420.29x = 2,052,899.79
  5. Step 5: Solve for x
    x = 2,052,899.79/1,420.29
  6. Step 6: Final answer
    x = 1,445.41

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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.