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Finding the Fourth Proportional to 707,953.50, 976,975.83 and 390,001.50

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Solution

The fourth proportional to 707,953.50, 976,975.83 and 390,001.50 is: 538,202.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,953.50 : 976,975.83 = 390,001.50 : x
  2. Step 2: Convert to fraction form
    707,953.50/976,975.83 = 390,001.50/x
  3. Step 3: Cross multiply
    707,953.50x = 976,975.83 × 390,001.50
  4. Step 4: Simplify right side
    707,953.50x = 381,022,039,163.75
  5. Step 5: Solve for x
    x = 381,022,039,163.75/707,953.50
  6. Step 6: Final answer
    x = 538,202.07

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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.