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Finding the Fourth Proportional to 438,897.81, 605,728.29 and 247,923.51

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Solution

The fourth proportional to 438,897.81, 605,728.29 and 247,923.51 is: 342,162.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,897.81 : 605,728.29 = 247,923.51 : x
  2. Step 2: Convert to fraction form
    438,897.81/605,728.29 = 247,923.51/x
  3. Step 3: Cross multiply
    438,897.81x = 605,728.29 × 247,923.51
  4. Step 4: Simplify right side
    438,897.81x = 150,174,283,763.10
  5. Step 5: Solve for x
    x = 150,174,283,763.10/438,897.81
  6. Step 6: Final answer
    x = 342,162.30

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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.