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Finding the Fourth Proportional to 643,574.57, 888,132.87 and 357,096.74

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Solution

The fourth proportional to 643,574.57, 888,132.87 and 357,096.74 is: 492,793.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,574.57 : 888,132.87 = 357,096.74 : x
  2. Step 2: Convert to fraction form
    643,574.57/888,132.87 = 357,096.74/x
  3. Step 3: Cross multiply
    643,574.57x = 888,132.87 × 357,096.74
  4. Step 4: Simplify right side
    643,574.57x = 317,149,348,123.18
  5. Step 5: Solve for x
    x = 317,149,348,123.18/643,574.57
  6. Step 6: Final answer
    x = 492,793.48

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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.