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Finding the Fourth Proportional to 657,015.57, 906,682.68 and 355,209.57

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Solution

The fourth proportional to 657,015.57, 906,682.68 and 355,209.57 is: 490,189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,015.57 : 906,682.68 = 355,209.57 : x
  2. Step 2: Convert to fraction form
    657,015.57/906,682.68 = 355,209.57/x
  3. Step 3: Cross multiply
    657,015.57x = 906,682.68 × 355,209.57
  4. Step 4: Simplify right side
    657,015.57x = 322,062,364,889.25
  5. Step 5: Solve for x
    x = 322,062,364,889.25/657,015.57
  6. Step 6: Final answer
    x = 490,189.85

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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.