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Finding the Fourth Proportional to 977.58, 1,349.55 and 756.03

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Solution

The fourth proportional to 977.58, 1,349.55 and 756.03 is: 1,043.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.58 : 1,349.55 = 756.03 : x
  2. Step 2: Convert to fraction form
    977.58/1,349.55 = 756.03/x
  3. Step 3: Cross multiply
    977.58x = 1,349.55 × 756.03
  4. Step 4: Simplify right side
    977.58x = 1,020,300.29
  5. Step 5: Solve for x
    x = 1,020,300.29/977.58
  6. Step 6: Final answer
    x = 1,043.70

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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.