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Finding the Fourth Proportional to 387,534.40, 581,301.60 and 365,761.60

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Solution

The fourth proportional to 387,534.40, 581,301.60 and 365,761.60 is: 548,642.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,534.40 : 581,301.60 = 365,761.60 : x
  2. Step 2: Convert to fraction form
    387,534.40/581,301.60 = 365,761.60/x
  3. Step 3: Cross multiply
    387,534.40x = 581,301.60 × 365,761.60
  4. Step 4: Simplify right side
    387,534.40x = 212,617,803,298.56
  5. Step 5: Solve for x
    x = 212,617,803,298.56/387,534.40
  6. Step 6: Final answer
    x = 548,642.40

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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.