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Finding the Fourth Proportional to 904.38, 1,356.55 and 722.93

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Solution

The fourth proportional to 904.38, 1,356.55 and 722.93 is: 1,084.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.38 : 1,356.55 = 722.93 : x
  2. Step 2: Convert to fraction form
    904.38/1,356.55 = 722.93/x
  3. Step 3: Cross multiply
    904.38x = 1,356.55 × 722.93
  4. Step 4: Simplify right side
    904.38x = 980,682.10
  5. Step 5: Solve for x
    x = 980,682.10/904.38
  6. Step 6: Final answer
    x = 1,084.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.