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Finding the Fourth Proportional to 1,307.23, 1,959.78 and 526.88

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Solution

The fourth proportional to 1,307.23, 1,959.78 and 526.88 is: 789.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.23 : 1,959.78 = 526.88 : x
  2. Step 2: Convert to fraction form
    1,307.23/1,959.78 = 526.88/x
  3. Step 3: Cross multiply
    1,307.23x = 1,959.78 × 526.88
  4. Step 4: Simplify right side
    1,307.23x = 1,032,568.89
  5. Step 5: Solve for x
    x = 1,032,568.89/1,307.23
  6. Step 6: Final answer
    x = 789.89

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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.