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Finding the Fourth Proportional to 643,439.16, 888,052.14 and 357,051.42

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Solution

The fourth proportional to 643,439.16, 888,052.14 and 357,051.42 is: 492,789.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,439.16 : 888,052.14 = 357,051.42 : x
  2. Step 2: Convert to fraction form
    643,439.16/888,052.14 = 357,051.42/x
  3. Step 3: Cross multiply
    643,439.16x = 888,052.14 × 357,051.42
  4. Step 4: Simplify right side
    643,439.16x = 317,080,277,621.04
  5. Step 5: Solve for x
    x = 317,080,277,621.04/643,439.16
  6. Step 6: Final answer
    x = 492,789.84

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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.