Home / 389,927.20-584,890.80-323,442.40

Finding the Fourth Proportional to 389,927.20, 584,890.80 and 323,442.40

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Solution

The fourth proportional to 389,927.20, 584,890.80 and 323,442.40 is: 485,163.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,927.20 : 584,890.80 = 323,442.40 : x
  2. Step 2: Convert to fraction form
    389,927.20/584,890.80 = 323,442.40/x
  3. Step 3: Cross multiply
    389,927.20x = 584,890.80 × 323,442.40
  4. Step 4: Simplify right side
    389,927.20x = 189,178,484,089.92
  5. Step 5: Solve for x
    x = 189,178,484,089.92/389,927.20
  6. Step 6: Final answer
    x = 485,163.60

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Double scale
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Similar ratio
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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.