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Finding the Fourth Proportional to 709,217.55, 978,680.34 and 403,368.34

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Solution

The fourth proportional to 709,217.55, 978,680.34 and 403,368.34 is: 556,625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,217.55 : 978,680.34 = 403,368.34 : x
  2. Step 2: Convert to fraction form
    709,217.55/978,680.34 = 403,368.34/x
  3. Step 3: Cross multiply
    709,217.55x = 978,680.34 × 403,368.34
  4. Step 4: Simplify right side
    709,217.55x = 394,768,662,698.16
  5. Step 5: Solve for x
    x = 394,768,662,698.16/709,217.55
  6. Step 6: Final answer
    x = 556,625.62

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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.