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Finding the Fourth Proportional to 420,747.40, 630,926.70 and 183,968.20

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Solution

The fourth proportional to 420,747.40, 630,926.70 and 183,968.20 is: 275,867.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,747.40 : 630,926.70 = 183,968.20 : x
  2. Step 2: Convert to fraction form
    420,747.40/630,926.70 = 183,968.20/x
  3. Step 3: Cross multiply
    420,747.40x = 630,926.70 × 183,968.20
  4. Step 4: Simplify right side
    420,747.40x = 116,070,449,330.94
  5. Step 5: Solve for x
    x = 116,070,449,330.94/420,747.40
  6. Step 6: Final answer
    x = 275,867.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.