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Finding the Fourth Proportional to 440,643.28, 608,091.36 and 239,439.28

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Solution

The fourth proportional to 440,643.28, 608,091.36 and 239,439.28 is: 330,428.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,643.28 : 608,091.36 = 239,439.28 : x
  2. Step 2: Convert to fraction form
    440,643.28/608,091.36 = 239,439.28/x
  3. Step 3: Cross multiply
    440,643.28x = 608,091.36 × 239,439.28
  4. Step 4: Simplify right side
    440,643.28x = 145,600,957,412.62
  5. Step 5: Solve for x
    x = 145,600,957,412.62/440,643.28
  6. Step 6: Final answer
    x = 330,428.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.