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Finding the Fourth Proportional to 1,264.74, 1,897.35 and 571.40

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Solution

The fourth proportional to 1,264.74, 1,897.35 and 571.40 is: 857.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.74 : 1,897.35 = 571.40 : x
  2. Step 2: Convert to fraction form
    1,264.74/1,897.35 = 571.40/x
  3. Step 3: Cross multiply
    1,264.74x = 1,897.35 × 571.40
  4. Step 4: Simplify right side
    1,264.74x = 1,084,145.79
  5. Step 5: Solve for x
    x = 1,084,145.79/1,264.74
  6. Step 6: Final answer
    x = 857.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.