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Finding the Fourth Proportional to 286,627.80, 394,642.86 and 260,055.74

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Solution

The fourth proportional to 286,627.80, 394,642.86 and 260,055.74 is: 358,057.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,627.80 : 394,642.86 = 260,055.74 : x
  2. Step 2: Convert to fraction form
    286,627.80/394,642.86 = 260,055.74/x
  3. Step 3: Cross multiply
    286,627.80x = 394,642.86 × 260,055.74
  4. Step 4: Simplify right side
    286,627.80x = 102,629,140,993.02
  5. Step 5: Solve for x
    x = 102,629,140,993.02/286,627.80
  6. Step 6: Final answer
    x = 358,057.18

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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.