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Finding the Fourth Proportional to 647.19, 971.33 and 339.93

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Solution

The fourth proportional to 647.19, 971.33 and 339.93 is: 510.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.19 : 971.33 = 339.93 : x
  2. Step 2: Convert to fraction form
    647.19/971.33 = 339.93/x
  3. Step 3: Cross multiply
    647.19x = 971.33 × 339.93
  4. Step 4: Simplify right side
    647.19x = 330,182.51
  5. Step 5: Solve for x
    x = 330,182.51/647.19
  6. Step 6: Final answer
    x = 510.18

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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.