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Finding the Fourth Proportional to 335,830.70, 503,746.05 and 86,512.70

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Solution

The fourth proportional to 335,830.70, 503,746.05 and 86,512.70 is: 129,769.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,830.70 : 503,746.05 = 86,512.70 : x
  2. Step 2: Convert to fraction form
    335,830.70/503,746.05 = 86,512.70/x
  3. Step 3: Cross multiply
    335,830.70x = 503,746.05 × 86,512.70
  4. Step 4: Simplify right side
    335,830.70x = 43,580,430,899.84
  5. Step 5: Solve for x
    x = 43,580,430,899.84/335,830.70
  6. Step 6: Final answer
    x = 129,769.05

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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.