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Finding the Fourth Proportional to 456,021.40, 684,032.10 and 288,059.80

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Solution

The fourth proportional to 456,021.40, 684,032.10 and 288,059.80 is: 432,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,021.40 : 684,032.10 = 288,059.80 : x
  2. Step 2: Convert to fraction form
    456,021.40/684,032.10 = 288,059.80/x
  3. Step 3: Cross multiply
    456,021.40x = 684,032.10 × 288,059.80
  4. Step 4: Simplify right side
    456,021.40x = 197,042,149,919.58
  5. Step 5: Solve for x
    x = 197,042,149,919.58/456,021.40
  6. Step 6: Final answer
    x = 432,089.70

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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.