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Finding the Fourth Proportional to 1,106.16, 1,526.64 and 640.56

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Solution

The fourth proportional to 1,106.16, 1,526.64 and 640.56 is: 884.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.16 : 1,526.64 = 640.56 : x
  2. Step 2: Convert to fraction form
    1,106.16/1,526.64 = 640.56/x
  3. Step 3: Cross multiply
    1,106.16x = 1,526.64 × 640.56
  4. Step 4: Simplify right side
    1,106.16x = 977,904.52
  5. Step 5: Solve for x
    x = 977,904.52/1,106.16
  6. Step 6: Final answer
    x = 884.05

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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.