Home / 1,089.47-1,501.80-913.03

Finding the Fourth Proportional to 1,089.47, 1,501.80 and 913.03

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Solution

The fourth proportional to 1,089.47, 1,501.80 and 913.03 is: 1,258.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.47 : 1,501.80 = 913.03 : x
  2. Step 2: Convert to fraction form
    1,089.47/1,501.80 = 913.03/x
  3. Step 3: Cross multiply
    1,089.47x = 1,501.80 × 913.03
  4. Step 4: Simplify right side
    1,089.47x = 1,371,188.45
  5. Step 5: Solve for x
    x = 1,371,188.45/1,089.47
  6. Step 6: Final answer
    x = 1,258.58

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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.