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Finding the Fourth Proportional to 1,335.39, 1,840.64 and 893.13

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Solution

The fourth proportional to 1,335.39, 1,840.64 and 893.13 is: 1,231.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.39 : 1,840.64 = 893.13 : x
  2. Step 2: Convert to fraction form
    1,335.39/1,840.64 = 893.13/x
  3. Step 3: Cross multiply
    1,335.39x = 1,840.64 × 893.13
  4. Step 4: Simplify right side
    1,335.39x = 1,643,926.34
  5. Step 5: Solve for x
    x = 1,643,926.34/1,335.39
  6. Step 6: Final answer
    x = 1,231.05

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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.