Home / 1,431.17-1,974.98-841.74

Finding the Fourth Proportional to 1,431.17, 1,974.98 and 841.74

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Solution

The fourth proportional to 1,431.17, 1,974.98 and 841.74 is: 1,161.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.17 : 1,974.98 = 841.74 : x
  2. Step 2: Convert to fraction form
    1,431.17/1,974.98 = 841.74/x
  3. Step 3: Cross multiply
    1,431.17x = 1,974.98 × 841.74
  4. Step 4: Simplify right side
    1,431.17x = 1,662,415.46
  5. Step 5: Solve for x
    x = 1,662,415.46/1,431.17
  6. Step 6: Final answer
    x = 1,161.58

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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.