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Finding the Fourth Proportional to 279,710.40, 385,999.20 and 152,385.60

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Solution

The fourth proportional to 279,710.40, 385,999.20 and 152,385.60 is: 210,291.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,710.40 : 385,999.20 = 152,385.60 : x
  2. Step 2: Convert to fraction form
    279,710.40/385,999.20 = 152,385.60/x
  3. Step 3: Cross multiply
    279,710.40x = 385,999.20 × 152,385.60
  4. Step 4: Simplify right side
    279,710.40x = 58,820,719,691.52
  5. Step 5: Solve for x
    x = 58,820,719,691.52/279,710.40
  6. Step 6: Final answer
    x = 210,291.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.