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Finding the Fourth Proportional to 387,762.60, 581,643.90 and 255,052.20

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Solution

The fourth proportional to 387,762.60, 581,643.90 and 255,052.20 is: 382,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,762.60 : 581,643.90 = 255,052.20 : x
  2. Step 2: Convert to fraction form
    387,762.60/581,643.90 = 255,052.20/x
  3. Step 3: Cross multiply
    387,762.60x = 581,643.90 × 255,052.20
  4. Step 4: Simplify right side
    387,762.60x = 148,349,556,311.58
  5. Step 5: Solve for x
    x = 148,349,556,311.58/387,762.60
  6. Step 6: Final answer
    x = 382,578.30

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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.