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Finding the Fourth Proportional to 627,503.60, 865,921.81 and 355,574.75

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Solution

The fourth proportional to 627,503.60, 865,921.81 and 355,574.75 is: 490,674.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,503.60 : 865,921.81 = 355,574.75 : x
  2. Step 2: Convert to fraction form
    627,503.60/865,921.81 = 355,574.75/x
  3. Step 3: Cross multiply
    627,503.60x = 865,921.81 × 355,574.75
  4. Step 4: Simplify right side
    627,503.60x = 307,899,931,110.30
  5. Step 5: Solve for x
    x = 307,899,931,110.30/627,503.60
  6. Step 6: Final answer
    x = 490,674.37

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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.