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Finding the Fourth Proportional to 387,699.76, 581,577.37 and 103,388.80

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Solution

The fourth proportional to 387,699.76, 581,577.37 and 103,388.80 is: 155,090.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,699.76 : 581,577.37 = 103,388.80 : x
  2. Step 2: Convert to fraction form
    387,699.76/581,577.37 = 103,388.80/x
  3. Step 3: Cross multiply
    387,699.76x = 581,577.37 × 103,388.80
  4. Step 4: Simplify right side
    387,699.76x = 60,128,583,225.10
  5. Step 5: Solve for x
    x = 60,128,583,225.10/387,699.76
  6. Step 6: Final answer
    x = 155,090.59

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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.