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Finding the Fourth Proportional to 975.51, 1,345.14 and 753.98

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Solution

The fourth proportional to 975.51, 1,345.14 and 753.98 is: 1,039.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.51 : 1,345.14 = 753.98 : x
  2. Step 2: Convert to fraction form
    975.51/1,345.14 = 753.98/x
  3. Step 3: Cross multiply
    975.51x = 1,345.14 × 753.98
  4. Step 4: Simplify right side
    975.51x = 1,014,201.93
  5. Step 5: Solve for x
    x = 1,014,201.93/975.51
  6. Step 6: Final answer
    x = 1,039.66

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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.