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Finding the Fourth Proportional to 455,875.20, 683,812.80 and 219,679.20

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Solution

The fourth proportional to 455,875.20, 683,812.80 and 219,679.20 is: 329,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,875.20 : 683,812.80 = 219,679.20 : x
  2. Step 2: Convert to fraction form
    455,875.20/683,812.80 = 219,679.20/x
  3. Step 3: Cross multiply
    455,875.20x = 683,812.80 × 219,679.20
  4. Step 4: Simplify right side
    455,875.20x = 150,219,448,853.76
  5. Step 5: Solve for x
    x = 150,219,448,853.76/455,875.20
  6. Step 6: Final answer
    x = 329,518.80

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Similar ratio
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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.