Home / 1,438.61-1,985.24-841.23

Finding the Fourth Proportional to 1,438.61, 1,985.24 and 841.23

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Solution

The fourth proportional to 1,438.61, 1,985.24 and 841.23 is: 1,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.61 : 1,985.24 = 841.23 : x
  2. Step 2: Convert to fraction form
    1,438.61/1,985.24 = 841.23/x
  3. Step 3: Cross multiply
    1,438.61x = 1,985.24 × 841.23
  4. Step 4: Simplify right side
    1,438.61x = 1,670,039.24
  5. Step 5: Solve for x
    x = 1,670,039.24/1,438.61
  6. Step 6: Final answer
    x = 1,160.87

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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.