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Finding the Fourth Proportional to 971.02, 1,340.06 and 572.80

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Solution

The fourth proportional to 971.02, 1,340.06 and 572.80 is: 790.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.02 : 1,340.06 = 572.80 : x
  2. Step 2: Convert to fraction form
    971.02/1,340.06 = 572.80/x
  3. Step 3: Cross multiply
    971.02x = 1,340.06 × 572.80
  4. Step 4: Simplify right side
    971.02x = 767,586.37
  5. Step 5: Solve for x
    x = 767,586.37/971.02
  6. Step 6: Final answer
    x = 790.49

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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.