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Finding the Fourth Proportional to 1,289.54, 1,779.56 and 700.08

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Solution

The fourth proportional to 1,289.54, 1,779.56 and 700.08 is: 966.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.54 : 1,779.56 = 700.08 : x
  2. Step 2: Convert to fraction form
    1,289.54/1,779.56 = 700.08/x
  3. Step 3: Cross multiply
    1,289.54x = 1,779.56 × 700.08
  4. Step 4: Simplify right side
    1,289.54x = 1,245,828.79
  5. Step 5: Solve for x
    x = 1,245,828.79/1,289.54
  6. Step 6: Final answer
    x = 966.11

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1.5x scale

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.