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Finding the Fourth Proportional to 385,856.40, 578,590.20 and 228,133.20

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Solution

The fourth proportional to 385,856.40, 578,590.20 and 228,133.20 is: 342,084.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,856.40 : 578,590.20 = 228,133.20 : x
  2. Step 2: Convert to fraction form
    385,856.40/578,590.20 = 228,133.20/x
  3. Step 3: Cross multiply
    385,856.40x = 578,590.20 × 228,133.20
  4. Step 4: Simplify right side
    385,856.40x = 131,995,633,814.64
  5. Step 5: Solve for x
    x = 131,995,633,814.64/385,856.40
  6. Step 6: Final answer
    x = 342,084.86

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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.