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Finding the Fourth Proportional to 424,215.56, 634,938.72 and 311,866.04

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Solution

The fourth proportional to 424,215.56, 634,938.72 and 311,866.04 is: 466,781.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,215.56 : 634,938.72 = 311,866.04 : x
  2. Step 2: Convert to fraction form
    424,215.56/634,938.72 = 311,866.04/x
  3. Step 3: Cross multiply
    424,215.56x = 634,938.72 × 311,866.04
  4. Step 4: Simplify right side
    424,215.56x = 198,015,824,249.07
  5. Step 5: Solve for x
    x = 198,015,824,249.07/424,215.56
  6. Step 6: Final answer
    x = 466,781.14

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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.