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Finding the Fourth Proportional to 762.28, 1,051.38 and 707.08

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Solution

The fourth proportional to 762.28, 1,051.38 and 707.08 is: 975.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.28 : 1,051.38 = 707.08 : x
  2. Step 2: Convert to fraction form
    762.28/1,051.38 = 707.08/x
  3. Step 3: Cross multiply
    762.28x = 1,051.38 × 707.08
  4. Step 4: Simplify right side
    762.28x = 743,409.77
  5. Step 5: Solve for x
    x = 743,409.77/762.28
  6. Step 6: Final answer
    x = 975.25

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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.