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Finding the Fourth Proportional to 256,649.18, 384,701.60 and 98,809.34

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Solution

The fourth proportional to 256,649.18, 384,701.60 and 98,809.34 is: 148,109.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,649.18 : 384,701.60 = 98,809.34 : x
  2. Step 2: Convert to fraction form
    256,649.18/384,701.60 = 98,809.34/x
  3. Step 3: Cross multiply
    256,649.18x = 384,701.60 × 98,809.34
  4. Step 4: Simplify right side
    256,649.18x = 38,012,109,516.46
  5. Step 5: Solve for x
    x = 38,012,109,516.46/256,649.18
  6. Step 6: Final answer
    x = 148,109.22

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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.