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Finding the Fourth Proportional to 627,421.41, 865,840.89 and 340,940.81

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Solution

The fourth proportional to 627,421.41, 865,840.89 and 340,940.81 is: 470,497.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,421.41 : 865,840.89 = 340,940.81 : x
  2. Step 2: Convert to fraction form
    627,421.41/865,840.89 = 340,940.81/x
  3. Step 3: Cross multiply
    627,421.41x = 865,840.89 × 340,940.81
  4. Step 4: Simplify right side
    627,421.41x = 295,200,492,663.02
  5. Step 5: Solve for x
    x = 295,200,492,663.02/627,421.41
  6. Step 6: Final answer
    x = 470,497.96

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1.5x scale

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.