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Finding the Fourth Proportional to 657,352.20, 907,146 and 355,546.20

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Solution

The fourth proportional to 657,352.20, 907,146 and 355,546.20 is: 490,653.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,352.20 : 907,146 = 355,546.20 : x
  2. Step 2: Convert to fraction form
    657,352.20/907,146 = 355,546.20/x
  3. Step 3: Cross multiply
    657,352.20x = 907,146 × 355,546.20
  4. Step 4: Simplify right side
    657,352.20x = 322,532,313,145.20
  5. Step 5: Solve for x
    x = 322,532,313,145.20/657,352.20
  6. Step 6: Final answer
    x = 490,653.74

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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.