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Finding the Fourth Proportional to 469.35, 646.45 and 407.18

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Solution

The fourth proportional to 469.35, 646.45 and 407.18 is: 560.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.35 : 646.45 = 407.18 : x
  2. Step 2: Convert to fraction form
    469.35/646.45 = 407.18/x
  3. Step 3: Cross multiply
    469.35x = 646.45 × 407.18
  4. Step 4: Simplify right side
    469.35x = 263,222.11
  5. Step 5: Solve for x
    x = 263,222.11/469.35
  6. Step 6: Final answer
    x = 560.82

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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.