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Finding the Fourth Proportional to 368,629.53, 508,708.65 and 207,485.45

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Solution

The fourth proportional to 368,629.53, 508,708.65 and 207,485.45 is: 286,329.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,629.53 : 508,708.65 = 207,485.45 : x
  2. Step 2: Convert to fraction form
    368,629.53/508,708.65 = 207,485.45/x
  3. Step 3: Cross multiply
    368,629.53x = 508,708.65 × 207,485.45
  4. Step 4: Simplify right side
    368,629.53x = 105,549,643,306.33
  5. Step 5: Solve for x
    x = 105,549,643,306.33/368,629.53
  6. Step 6: Final answer
    x = 286,329.86

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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.