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Finding the Fourth Proportional to 286,617.09, 429,925.05 and 76,255.05

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Solution

The fourth proportional to 286,617.09, 429,925.05 and 76,255.05 is: 114,382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,617.09 : 429,925.05 = 76,255.05 : x
  2. Step 2: Convert to fraction form
    286,617.09/429,925.05 = 76,255.05/x
  3. Step 3: Cross multiply
    286,617.09x = 429,925.05 × 76,255.05
  4. Step 4: Simplify right side
    286,617.09x = 32,783,956,184.00
  5. Step 5: Solve for x
    x = 32,783,956,184.00/286,617.09
  6. Step 6: Final answer
    x = 114,382.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.