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Finding the Fourth Proportional to 256,893.20, 385,339.80 and 157,360.40

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Solution

The fourth proportional to 256,893.20, 385,339.80 and 157,360.40 is: 236,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,893.20 : 385,339.80 = 157,360.40 : x
  2. Step 2: Convert to fraction form
    256,893.20/385,339.80 = 157,360.40/x
  3. Step 3: Cross multiply
    256,893.20x = 385,339.80 × 157,360.40
  4. Step 4: Simplify right side
    256,893.20x = 60,637,225,063.92
  5. Step 5: Solve for x
    x = 60,637,225,063.92/256,893.20
  6. Step 6: Final answer
    x = 236,040.60

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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.