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Finding the Fourth Proportional to 657,245.28, 906,995.76 and 355,438.56

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Solution

The fourth proportional to 657,245.28, 906,995.76 and 355,438.56 is: 490,503.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,245.28 : 906,995.76 = 355,438.56 : x
  2. Step 2: Convert to fraction form
    657,245.28/906,995.76 = 355,438.56/x
  3. Step 3: Cross multiply
    657,245.28x = 906,995.76 × 355,438.56
  4. Step 4: Simplify right side
    657,245.28x = 322,381,266,860.51
  5. Step 5: Solve for x
    x = 322,381,266,860.51/657,245.28
  6. Step 6: Final answer
    x = 490,503.74

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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.