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Finding the Fourth Proportional to 405,287.80, 607,931.70 and 372,110.20

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Solution

The fourth proportional to 405,287.80, 607,931.70 and 372,110.20 is: 558,165.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,287.80 : 607,931.70 = 372,110.20 : x
  2. Step 2: Convert to fraction form
    405,287.80/607,931.70 = 372,110.20/x
  3. Step 3: Cross multiply
    405,287.80x = 607,931.70 × 372,110.20
  4. Step 4: Simplify right side
    405,287.80x = 226,217,586,473.34
  5. Step 5: Solve for x
    x = 226,217,586,473.34/405,287.80
  6. Step 6: Final answer
    x = 558,165.30

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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.