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Finding the Fourth Proportional to 486,762.98, 671,296.52 and 405,360.78

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Solution

The fourth proportional to 486,762.98, 671,296.52 and 405,360.78 is: 559,034.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,762.98 : 671,296.52 = 405,360.78 : x
  2. Step 2: Convert to fraction form
    486,762.98/671,296.52 = 405,360.78/x
  3. Step 3: Cross multiply
    486,762.98x = 671,296.52 × 405,360.78
  4. Step 4: Simplify right side
    486,762.98x = 272,117,280,958.49
  5. Step 5: Solve for x
    x = 272,117,280,958.49/486,762.98
  6. Step 6: Final answer
    x = 559,034.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.