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Finding the Fourth Proportional to 299,875.20, 449,812.80 and 78,259.20

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Solution

The fourth proportional to 299,875.20, 449,812.80 and 78,259.20 is: 117,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,875.20 : 449,812.80 = 78,259.20 : x
  2. Step 2: Convert to fraction form
    299,875.20/449,812.80 = 78,259.20/x
  3. Step 3: Cross multiply
    299,875.20x = 449,812.80 × 78,259.20
  4. Step 4: Simplify right side
    299,875.20x = 35,201,989,877.76
  5. Step 5: Solve for x
    x = 35,201,989,877.76/299,875.20
  6. Step 6: Final answer
    x = 117,388.80

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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.