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Finding the Fourth Proportional to 627,422.76, 865,841.94 and 355,490.10

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Solution

The fourth proportional to 627,422.76, 865,841.94 and 355,490.10 is: 490,575.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,422.76 : 865,841.94 = 355,490.10 : x
  2. Step 2: Convert to fraction form
    627,422.76/865,841.94 = 355,490.10/x
  3. Step 3: Cross multiply
    627,422.76x = 865,841.94 × 355,490.10
  4. Step 4: Simplify right side
    627,422.76x = 307,798,237,834.79
  5. Step 5: Solve for x
    x = 307,798,237,834.79/627,422.76
  6. Step 6: Final answer
    x = 490,575.51

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Double scale
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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.