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Finding the Fourth Proportional to 387,776.60, 581,664.90 and 255,066.20

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Solution

The fourth proportional to 387,776.60, 581,664.90 and 255,066.20 is: 382,599.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,776.60 : 581,664.90 = 255,066.20 : x
  2. Step 2: Convert to fraction form
    387,776.60/581,664.90 = 255,066.20/x
  3. Step 3: Cross multiply
    387,776.60x = 581,664.90 × 255,066.20
  4. Step 4: Simplify right side
    387,776.60x = 148,363,055,716.38
  5. Step 5: Solve for x
    x = 148,363,055,716.38/387,776.60
  6. Step 6: Final answer
    x = 382,599.30

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1.5x scale

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.