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Finding the Fourth Proportional to 228,665.40, 342,998.10 and 70,909.80

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Solution

The fourth proportional to 228,665.40, 342,998.10 and 70,909.80 is: 106,364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,665.40 : 342,998.10 = 70,909.80 : x
  2. Step 2: Convert to fraction form
    228,665.40/342,998.10 = 70,909.80/x
  3. Step 3: Cross multiply
    228,665.40x = 342,998.10 × 70,909.80
  4. Step 4: Simplify right side
    228,665.40x = 24,321,926,671.38
  5. Step 5: Solve for x
    x = 24,321,926,671.38/228,665.40
  6. Step 6: Final answer
    x = 106,364.70

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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.