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Finding the Fourth Proportional to 387,980.10, 581,994.75 and 121,751.12

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Solution

The fourth proportional to 387,980.10, 581,994.75 and 121,751.12 is: 182,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,980.10 : 581,994.75 = 121,751.12 : x
  2. Step 2: Convert to fraction form
    387,980.10/581,994.75 = 121,751.12/x
  3. Step 3: Cross multiply
    387,980.10x = 581,994.75 × 121,751.12
  4. Step 4: Simplify right side
    387,980.10x = 70,858,512,646.62
  5. Step 5: Solve for x
    x = 70,858,512,646.62/387,980.10
  6. Step 6: Final answer
    x = 182,634.40

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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.