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Finding the Fourth Proportional to 318,097.80, 477,000.90 and 140,513.40

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Solution

The fourth proportional to 318,097.80, 477,000.90 and 140,513.40 is: 210,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,097.80 : 477,000.90 = 140,513.40 : x
  2. Step 2: Convert to fraction form
    318,097.80/477,000.90 = 140,513.40/x
  3. Step 3: Cross multiply
    318,097.80x = 477,000.90 × 140,513.40
  4. Step 4: Simplify right side
    318,097.80x = 67,025,018,262.06
  5. Step 5: Solve for x
    x = 67,025,018,262.06/318,097.80
  6. Step 6: Final answer
    x = 210,705.70

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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.