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Finding the Fourth Proportional to 262,287.10, 393,430.65 and 84,921.40

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Solution

The fourth proportional to 262,287.10, 393,430.65 and 84,921.40 is: 127,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,287.10 : 393,430.65 = 84,921.40 : x
  2. Step 2: Convert to fraction form
    262,287.10/393,430.65 = 84,921.40/x
  3. Step 3: Cross multiply
    262,287.10x = 393,430.65 × 84,921.40
  4. Step 4: Simplify right side
    262,287.10x = 33,410,681,600.91
  5. Step 5: Solve for x
    x = 33,410,681,600.91/262,287.10
  6. Step 6: Final answer
    x = 127,382.10

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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.