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Finding the Fourth Proportional to 456,235.40, 684,288.30 and 156,729.80

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Solution

The fourth proportional to 456,235.40, 684,288.30 and 156,729.80 is: 235,072.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,235.40 : 684,288.30 = 156,729.80 : x
  2. Step 2: Convert to fraction form
    456,235.40/684,288.30 = 156,729.80/x
  3. Step 3: Cross multiply
    456,235.40x = 684,288.30 × 156,729.80
  4. Step 4: Simplify right side
    456,235.40x = 107,248,368,401.34
  5. Step 5: Solve for x
    x = 107,248,368,401.34/456,235.40
  6. Step 6: Final answer
    x = 235,072.44

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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.