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Finding the Fourth Proportional to 368,990.71, 509,139.54 and 207,811.24

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Solution

The fourth proportional to 368,990.71, 509,139.54 and 207,811.24 is: 286,741.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,990.71 : 509,139.54 = 207,811.24 : x
  2. Step 2: Convert to fraction form
    368,990.71/509,139.54 = 207,811.24/x
  3. Step 3: Cross multiply
    368,990.71x = 509,139.54 × 207,811.24
  4. Step 4: Simplify right side
    368,990.71x = 105,804,917,867.58
  5. Step 5: Solve for x
    x = 105,804,917,867.58/368,990.71
  6. Step 6: Final answer
    x = 286,741.42

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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.