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Finding the Fourth Proportional to 708,792.67, 978,098.43 and 402,828.62

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Solution

The fourth proportional to 708,792.67, 978,098.43 and 402,828.62 is: 555,883.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,792.67 : 978,098.43 = 402,828.62 : x
  2. Step 2: Convert to fraction form
    708,792.67/978,098.43 = 402,828.62/x
  3. Step 3: Cross multiply
    708,792.67x = 978,098.43 × 402,828.62
  4. Step 4: Simplify right side
    708,792.67x = 394,006,040,781.07
  5. Step 5: Solve for x
    x = 394,006,040,781.07/708,792.67
  6. Step 6: Final answer
    x = 555,883.35

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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.