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Finding the Fourth Proportional to 256,948.63, 354,354.82 and 220,638.67

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Solution

The fourth proportional to 256,948.63, 354,354.82 and 220,638.67 is: 304,280.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,948.63 : 354,354.82 = 220,638.67 : x
  2. Step 2: Convert to fraction form
    256,948.63/354,354.82 = 220,638.67/x
  3. Step 3: Cross multiply
    256,948.63x = 354,354.82 × 220,638.67
  4. Step 4: Simplify right side
    256,948.63x = 78,184,374,755.41
  5. Step 5: Solve for x
    x = 78,184,374,755.41/256,948.63
  6. Step 6: Final answer
    x = 304,280.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.