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Finding the Fourth Proportional to 486,762.19, 671,295.48 and 405,360

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Solution

The fourth proportional to 486,762.19, 671,295.48 and 405,360 is: 559,033.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,762.19 : 671,295.48 = 405,360 : x
  2. Step 2: Convert to fraction form
    486,762.19/671,295.48 = 405,360/x
  3. Step 3: Cross multiply
    486,762.19x = 671,295.48 × 405,360
  4. Step 4: Simplify right side
    486,762.19x = 272,116,334,252.70
  5. Step 5: Solve for x
    x = 272,116,334,252.70/486,762.19
  6. Step 6: Final answer
    x = 559,033.43

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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.