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Finding the Fourth Proportional to 312,038.20, 468,132.90 and 90,422.20

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Solution

The fourth proportional to 312,038.20, 468,132.90 and 90,422.20 is: 135,655.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,038.20 : 468,132.90 = 90,422.20 : x
  2. Step 2: Convert to fraction form
    312,038.20/468,132.90 = 90,422.20/x
  3. Step 3: Cross multiply
    312,038.20x = 468,132.90 × 90,422.20
  4. Step 4: Simplify right side
    312,038.20x = 42,329,606,710.38
  5. Step 5: Solve for x
    x = 42,329,606,710.38/312,038.20
  6. Step 6: Final answer
    x = 135,655.21

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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.