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Finding the Fourth Proportional to 1,342.48, 1,853.40 and 877

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Solution

The fourth proportional to 1,342.48, 1,853.40 and 877 is: 1,210.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.48 : 1,853.40 = 877 : x
  2. Step 2: Convert to fraction form
    1,342.48/1,853.40 = 877/x
  3. Step 3: Cross multiply
    1,342.48x = 1,853.40 × 877
  4. Step 4: Simplify right side
    1,342.48x = 1,625,431.80
  5. Step 5: Solve for x
    x = 1,625,431.80/1,342.48
  6. Step 6: Final answer
    x = 1,210.77

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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.