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Finding the Fourth Proportional to 469.42, 647.87 and 282.93

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Solution

The fourth proportional to 469.42, 647.87 and 282.93 is: 390.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.42 : 647.87 = 282.93 : x
  2. Step 2: Convert to fraction form
    469.42/647.87 = 282.93/x
  3. Step 3: Cross multiply
    469.42x = 647.87 × 282.93
  4. Step 4: Simplify right side
    469.42x = 183,305.00
  5. Step 5: Solve for x
    x = 183,305.00/469.42
  6. Step 6: Final answer
    x = 390.50

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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.