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Finding the Fourth Proportional to 318,501.70, 477,752.55 and 128,961.70

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Solution

The fourth proportional to 318,501.70, 477,752.55 and 128,961.70 is: 193,442.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,501.70 : 477,752.55 = 128,961.70 : x
  2. Step 2: Convert to fraction form
    318,501.70/477,752.55 = 128,961.70/x
  3. Step 3: Cross multiply
    318,501.70x = 477,752.55 × 128,961.70
  4. Step 4: Simplify right side
    318,501.70x = 61,611,781,027.34
  5. Step 5: Solve for x
    x = 61,611,781,027.34/318,501.70
  6. Step 6: Final answer
    x = 193,442.55

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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.