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Finding the Fourth Proportional to 1,534.02, 2,300.64 and 438.40

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Solution

The fourth proportional to 1,534.02, 2,300.64 and 438.40 is: 657.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,534.02 : 2,300.64 = 438.40 : x
  2. Step 2: Convert to fraction form
    1,534.02/2,300.64 = 438.40/x
  3. Step 3: Cross multiply
    1,534.02x = 2,300.64 × 438.40
  4. Step 4: Simplify right side
    1,534.02x = 1,008,600.58
  5. Step 5: Solve for x
    x = 1,008,600.58/1,534.02
  6. Step 6: Final answer
    x = 657.49

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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.