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Finding the Fourth Proportional to 1,016.51, 1,402.79 and 623.39

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Solution

The fourth proportional to 1,016.51, 1,402.79 and 623.39 is: 860.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.51 : 1,402.79 = 623.39 : x
  2. Step 2: Convert to fraction form
    1,016.51/1,402.79 = 623.39/x
  3. Step 3: Cross multiply
    1,016.51x = 1,402.79 × 623.39
  4. Step 4: Simplify right side
    1,016.51x = 874,475.13
  5. Step 5: Solve for x
    x = 874,475.13/1,016.51
  6. Step 6: Final answer
    x = 860.28

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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.