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Finding the Fourth Proportional to 709,364.73, 978,944.89 and 403,485.10

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Solution

The fourth proportional to 709,364.73, 978,944.89 and 403,485.10 is: 556,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,364.73 : 978,944.89 = 403,485.10 : x
  2. Step 2: Convert to fraction form
    709,364.73/978,944.89 = 403,485.10/x
  3. Step 3: Cross multiply
    709,364.73x = 978,944.89 × 403,485.10
  4. Step 4: Simplify right side
    709,364.73x = 394,989,676,836.14
  5. Step 5: Solve for x
    x = 394,989,676,836.14/709,364.73
  6. Step 6: Final answer
    x = 556,821.70

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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.