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Finding the Fourth Proportional to 432,005.80, 648,008.70 and 405,761.80

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Solution

The fourth proportional to 432,005.80, 648,008.70 and 405,761.80 is: 608,642.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,005.80 : 648,008.70 = 405,761.80 : x
  2. Step 2: Convert to fraction form
    432,005.80/648,008.70 = 405,761.80/x
  3. Step 3: Cross multiply
    432,005.80x = 648,008.70 × 405,761.80
  4. Step 4: Simplify right side
    432,005.80x = 262,937,176,527.66
  5. Step 5: Solve for x
    x = 262,937,176,527.66/432,005.80
  6. Step 6: Final answer
    x = 608,642.70

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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.