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Finding the Fourth Proportional to 368,395.76, 508,357 and 207,218.72

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Solution

The fourth proportional to 368,395.76, 508,357 and 207,218.72 is: 285,945.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,395.76 : 508,357 = 207,218.72 : x
  2. Step 2: Convert to fraction form
    368,395.76/508,357 = 207,218.72/x
  3. Step 3: Cross multiply
    368,395.76x = 508,357 × 207,218.72
  4. Step 4: Simplify right side
    368,395.76x = 105,341,086,843.04
  5. Step 5: Solve for x
    x = 105,341,086,843.04/368,395.76
  6. Step 6: Final answer
    x = 285,945.44

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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.