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Finding the Fourth Proportional to 430,866.80, 646,300.20 and 194,670.80

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Solution

The fourth proportional to 430,866.80, 646,300.20 and 194,670.80 is: 292,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,866.80 : 646,300.20 = 194,670.80 : x
  2. Step 2: Convert to fraction form
    430,866.80/646,300.20 = 194,670.80/x
  3. Step 3: Cross multiply
    430,866.80x = 646,300.20 × 194,670.80
  4. Step 4: Simplify right side
    430,866.80x = 125,815,776,974.16
  5. Step 5: Solve for x
    x = 125,815,776,974.16/430,866.80
  6. Step 6: Final answer
    x = 292,006.20

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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.