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Finding the Fourth Proportional to 479,970.87, 720,349.83 and 243,381.21

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Solution

The fourth proportional to 479,970.87, 720,349.83 and 243,381.21 is: 365,271.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,970.87 : 720,349.83 = 243,381.21 : x
  2. Step 2: Convert to fraction form
    479,970.87/720,349.83 = 243,381.21/x
  3. Step 3: Cross multiply
    479,970.87x = 720,349.83 × 243,381.21
  4. Step 4: Simplify right side
    479,970.87x = 175,319,613,248.69
  5. Step 5: Solve for x
    x = 175,319,613,248.69/479,970.87
  6. Step 6: Final answer
    x = 365,271.36

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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.