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Finding the Fourth Proportional to 977.50, 1,349.53 and 745.06

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Solution

The fourth proportional to 977.50, 1,349.53 and 745.06 is: 1,028.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.50 : 1,349.53 = 745.06 : x
  2. Step 2: Convert to fraction form
    977.50/1,349.53 = 745.06/x
  3. Step 3: Cross multiply
    977.50x = 1,349.53 × 745.06
  4. Step 4: Simplify right side
    977.50x = 1,005,480.82
  5. Step 5: Solve for x
    x = 1,005,480.82/977.50
  6. Step 6: Final answer
    x = 1,028.62

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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.