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Finding the Fourth Proportional to 627,303.96, 865,651.25 and 355,366.31

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Solution

The fourth proportional to 627,303.96, 865,651.25 and 355,366.31 is: 490,389.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,303.96 : 865,651.25 = 355,366.31 : x
  2. Step 2: Convert to fraction form
    627,303.96/865,651.25 = 355,366.31/x
  3. Step 3: Cross multiply
    627,303.96x = 865,651.25 × 355,366.31
  4. Step 4: Simplify right side
    627,303.96x = 307,623,287,019.55
  5. Step 5: Solve for x
    x = 307,623,287,019.55/627,303.96
  6. Step 6: Final answer
    x = 490,389.52

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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.