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Finding the Fourth Proportional to 438,681, 605,350.72 and 254,903.20

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Solution

The fourth proportional to 438,681, 605,350.72 and 254,903.20 is: 351,749.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,681 : 605,350.72 = 254,903.20 : x
  2. Step 2: Convert to fraction form
    438,681/605,350.72 = 254,903.20/x
  3. Step 3: Cross multiply
    438,681x = 605,350.72 × 254,903.20
  4. Step 4: Simplify right side
    438,681x = 154,305,835,650.30
  5. Step 5: Solve for x
    x = 154,305,835,650.30/438,681
  6. Step 6: Final answer
    x = 351,749.53

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1.5x scale

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.