Home / 1,430.72-1,974.40-841.26

Finding the Fourth Proportional to 1,430.72, 1,974.40 and 841.26

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Solution

The fourth proportional to 1,430.72, 1,974.40 and 841.26 is: 1,160.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.72 : 1,974.40 = 841.26 : x
  2. Step 2: Convert to fraction form
    1,430.72/1,974.40 = 841.26/x
  3. Step 3: Cross multiply
    1,430.72x = 1,974.40 × 841.26
  4. Step 4: Simplify right side
    1,430.72x = 1,660,983.74
  5. Step 5: Solve for x
    x = 1,660,983.74/1,430.72
  6. Step 6: Final answer
    x = 1,160.94

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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.