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Finding the Fourth Proportional to 709,117.95, 978,596.66 and 386,840.01

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Solution

The fourth proportional to 709,117.95, 978,596.66 and 386,840.01 is: 533,846.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,117.95 : 978,596.66 = 386,840.01 : x
  2. Step 2: Convert to fraction form
    709,117.95/978,596.66 = 386,840.01/x
  3. Step 3: Cross multiply
    709,117.95x = 978,596.66 × 386,840.01
  4. Step 4: Simplify right side
    709,117.95x = 378,560,341,740.37
  5. Step 5: Solve for x
    x = 378,560,341,740.37/709,117.95
  6. Step 6: Final answer
    x = 533,846.79

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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.