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Finding the Fourth Proportional to 688.09, 1,030.60 and 533.55

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Solution

The fourth proportional to 688.09, 1,030.60 and 533.55 is: 799.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.09 : 1,030.60 = 533.55 : x
  2. Step 2: Convert to fraction form
    688.09/1,030.60 = 533.55/x
  3. Step 3: Cross multiply
    688.09x = 1,030.60 × 533.55
  4. Step 4: Simplify right side
    688.09x = 549,876.63
  5. Step 5: Solve for x
    x = 549,876.63/688.09
  6. Step 6: Final answer
    x = 799.13

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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.