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Finding the Fourth Proportional to 635,307.40, 876,770.22 and 420,074.20

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Solution

The fourth proportional to 635,307.40, 876,770.22 and 420,074.20 is: 579,732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,307.40 : 876,770.22 = 420,074.20 : x
  2. Step 2: Convert to fraction form
    635,307.40/876,770.22 = 420,074.20/x
  3. Step 3: Cross multiply
    635,307.40x = 876,770.22 × 420,074.20
  4. Step 4: Simplify right side
    635,307.40x = 368,308,548,750.32
  5. Step 5: Solve for x
    x = 368,308,548,750.32/635,307.40
  6. Step 6: Final answer
    x = 579,732.82

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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.