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Finding the Fourth Proportional to 407.67, 607.87 and 400.38

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Solution

The fourth proportional to 407.67, 607.87 and 400.38 is: 597.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.67 : 607.87 = 400.38 : x
  2. Step 2: Convert to fraction form
    407.67/607.87 = 400.38/x
  3. Step 3: Cross multiply
    407.67x = 607.87 × 400.38
  4. Step 4: Simplify right side
    407.67x = 243,378.99
  5. Step 5: Solve for x
    x = 243,378.99/407.67
  6. Step 6: Final answer
    x = 597.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.