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Finding the Fourth Proportional to 643,705.04, 888,343.26 and 357,227.48

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Solution

The fourth proportional to 643,705.04, 888,343.26 and 357,227.48 is: 492,990.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,705.04 : 888,343.26 = 357,227.48 : x
  2. Step 2: Convert to fraction form
    643,705.04/888,343.26 = 357,227.48/x
  3. Step 3: Cross multiply
    643,705.04x = 888,343.26 × 357,227.48
  4. Step 4: Simplify right side
    643,705.04x = 317,340,624,144.79
  5. Step 5: Solve for x
    x = 317,340,624,144.79/643,705.04
  6. Step 6: Final answer
    x = 492,990.74

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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.