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Finding the Fourth Proportional to 971.15, 1,340.20 and 529.06

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Solution

The fourth proportional to 971.15, 1,340.20 and 529.06 is: 730.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.15 : 1,340.20 = 529.06 : x
  2. Step 2: Convert to fraction form
    971.15/1,340.20 = 529.06/x
  3. Step 3: Cross multiply
    971.15x = 1,340.20 × 529.06
  4. Step 4: Simplify right side
    971.15x = 709,040.22
  5. Step 5: Solve for x
    x = 709,040.22/971.15
  6. Step 6: Final answer
    x = 730.10

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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.