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Finding the Fourth Proportional to 1,129.55, 1,558.59 and 650.93

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Solution

The fourth proportional to 1,129.55, 1,558.59 and 650.93 is: 898.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.55 : 1,558.59 = 650.93 : x
  2. Step 2: Convert to fraction form
    1,129.55/1,558.59 = 650.93/x
  3. Step 3: Cross multiply
    1,129.55x = 1,558.59 × 650.93
  4. Step 4: Simplify right side
    1,129.55x = 1,014,532.99
  5. Step 5: Solve for x
    x = 1,014,532.99/1,129.55
  6. Step 6: Final answer
    x = 898.17

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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.