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Finding the Fourth Proportional to 709,455.06, 978,961.86 and 403,570.26

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Solution

The fourth proportional to 709,455.06, 978,961.86 and 403,570.26 is: 556,877.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,455.06 : 978,961.86 = 403,570.26 : x
  2. Step 2: Convert to fraction form
    709,455.06/978,961.86 = 403,570.26/x
  3. Step 3: Cross multiply
    709,455.06x = 978,961.86 × 403,570.26
  4. Step 4: Simplify right side
    709,455.06x = 395,079,892,370.28
  5. Step 5: Solve for x
    x = 395,079,892,370.28/709,455.06
  6. Step 6: Final answer
    x = 556,877.97

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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.