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Finding the Fourth Proportional to 423,079.20, 634,618.80 and 403,396.20

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Solution

The fourth proportional to 423,079.20, 634,618.80 and 403,396.20 is: 605,094.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,079.20 : 634,618.80 = 403,396.20 : x
  2. Step 2: Convert to fraction form
    423,079.20/634,618.80 = 403,396.20/x
  3. Step 3: Cross multiply
    423,079.20x = 634,618.80 × 403,396.20
  4. Step 4: Simplify right side
    423,079.20x = 256,002,812,368.56
  5. Step 5: Solve for x
    x = 256,002,812,368.56/423,079.20
  6. Step 6: Final answer
    x = 605,094.30

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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.