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Finding the Fourth Proportional to 643,926.74, 888,574.44 and 357,424.27

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Solution

The fourth proportional to 643,926.74, 888,574.44 and 357,424.27 is: 493,220.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,926.74 : 888,574.44 = 357,424.27 : x
  2. Step 2: Convert to fraction form
    643,926.74/888,574.44 = 357,424.27/x
  3. Step 3: Cross multiply
    643,926.74x = 888,574.44 × 357,424.27
  4. Step 4: Simplify right side
    643,926.74x = 317,598,066,114.79
  5. Step 5: Solve for x
    x = 317,598,066,114.79/643,926.74
  6. Step 6: Final answer
    x = 493,220.81

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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.