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Finding the Fourth Proportional to 647.07, 970.53 and 214.21

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Solution

The fourth proportional to 647.07, 970.53 and 214.21 is: 321.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.07 : 970.53 = 214.21 : x
  2. Step 2: Convert to fraction form
    647.07/970.53 = 214.21/x
  3. Step 3: Cross multiply
    647.07x = 970.53 × 214.21
  4. Step 4: Simplify right side
    647.07x = 207,897.23
  5. Step 5: Solve for x
    x = 207,897.23/647.07
  6. Step 6: Final answer
    x = 321.29

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1.5x scale

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.