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Finding the Fourth Proportional to 456,089.40, 684,134.10 and 288,127.80

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Solution

The fourth proportional to 456,089.40, 684,134.10 and 288,127.80 is: 432,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,089.40 : 684,134.10 = 288,127.80 : x
  2. Step 2: Convert to fraction form
    456,089.40/684,134.10 = 288,127.80/x
  3. Step 3: Cross multiply
    456,089.40x = 684,134.10 × 288,127.80
  4. Step 4: Simplify right side
    456,089.40x = 197,118,053,137.98
  5. Step 5: Solve for x
    x = 197,118,053,137.98/456,089.40
  6. Step 6: Final answer
    x = 432,191.70

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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.