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Finding the Fourth Proportional to 256,885.60, 385,328.40 and 162,407.20

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Solution

The fourth proportional to 256,885.60, 385,328.40 and 162,407.20 is: 243,610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,885.60 : 385,328.40 = 162,407.20 : x
  2. Step 2: Convert to fraction form
    256,885.60/385,328.40 = 162,407.20/x
  3. Step 3: Cross multiply
    256,885.60x = 385,328.40 × 162,407.20
  4. Step 4: Simplify right side
    256,885.60x = 62,580,106,524.48
  5. Step 5: Solve for x
    x = 62,580,106,524.48/256,885.60
  6. Step 6: Final answer
    x = 243,610.80

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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.