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Finding the Fourth Proportional to 1,088.33, 1,501.40 and 645.98

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Solution

The fourth proportional to 1,088.33, 1,501.40 and 645.98 is: 891.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.33 : 1,501.40 = 645.98 : x
  2. Step 2: Convert to fraction form
    1,088.33/1,501.40 = 645.98/x
  3. Step 3: Cross multiply
    1,088.33x = 1,501.40 × 645.98
  4. Step 4: Simplify right side
    1,088.33x = 969,879.74
  5. Step 5: Solve for x
    x = 969,879.74/1,088.33
  6. Step 6: Final answer
    x = 891.16

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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.