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Finding the Fourth Proportional to 651.74, 899.10 and 386.10

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Solution

The fourth proportional to 651.74, 899.10 and 386.10 is: 532.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.74 : 899.10 = 386.10 : x
  2. Step 2: Convert to fraction form
    651.74/899.10 = 386.10/x
  3. Step 3: Cross multiply
    651.74x = 899.10 × 386.10
  4. Step 4: Simplify right side
    651.74x = 347,142.51
  5. Step 5: Solve for x
    x = 347,142.51/651.74
  6. Step 6: Final answer
    x = 532.64

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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.