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Finding the Fourth Proportional to 277,319.12, 415,978.68 and 90,330.60

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Solution

The fourth proportional to 277,319.12, 415,978.68 and 90,330.60 is: 135,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,319.12 : 415,978.68 = 90,330.60 : x
  2. Step 2: Convert to fraction form
    277,319.12/415,978.68 = 90,330.60/x
  3. Step 3: Cross multiply
    277,319.12x = 415,978.68 × 90,330.60
  4. Step 4: Simplify right side
    277,319.12x = 37,575,603,751.61
  5. Step 5: Solve for x
    x = 37,575,603,751.61/277,319.12
  6. Step 6: Final answer
    x = 135,495.90

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Similar ratio
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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.