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Finding the Fourth Proportional to 708,856.62, 978,246.60 and 402,945.80

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Solution

The fourth proportional to 708,856.62, 978,246.60 and 402,945.80 is: 556,079.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,856.62 : 978,246.60 = 402,945.80 : x
  2. Step 2: Convert to fraction form
    708,856.62/978,246.60 = 402,945.80/x
  3. Step 3: Cross multiply
    708,856.62x = 978,246.60 × 402,945.80
  4. Step 4: Simplify right side
    708,856.62x = 394,180,358,834.28
  5. Step 5: Solve for x
    x = 394,180,358,834.28/708,856.62
  6. Step 6: Final answer
    x = 556,079.11

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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.