Home / 480,018.30-720,027.45-389,816.70

Finding the Fourth Proportional to 480,018.30, 720,027.45 and 389,816.70

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Solution

The fourth proportional to 480,018.30, 720,027.45 and 389,816.70 is: 584,725.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,018.30 : 720,027.45 = 389,816.70 : x
  2. Step 2: Convert to fraction form
    480,018.30/720,027.45 = 389,816.70/x
  3. Step 3: Cross multiply
    480,018.30x = 720,027.45 × 389,816.70
  4. Step 4: Simplify right side
    480,018.30x = 280,678,724,468.42
  5. Step 5: Solve for x
    x = 280,678,724,468.42/480,018.30
  6. Step 6: Final answer
    x = 584,725.05

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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.