Home / 256,875.20-385,312.80-203,998.40

Finding the Fourth Proportional to 256,875.20, 385,312.80 and 203,998.40

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Solution

The fourth proportional to 256,875.20, 385,312.80 and 203,998.40 is: 305,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,875.20 : 385,312.80 = 203,998.40 : x
  2. Step 2: Convert to fraction form
    256,875.20/385,312.80 = 203,998.40/x
  3. Step 3: Cross multiply
    256,875.20x = 385,312.80 × 203,998.40
  4. Step 4: Simplify right side
    256,875.20x = 78,603,194,699.52
  5. Step 5: Solve for x
    x = 78,603,194,699.52/256,875.20
  6. Step 6: Final answer
    x = 305,997.60

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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.