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Finding the Fourth Proportional to 405,511.40, 608,007.90 and 168,948.20

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Solution

The fourth proportional to 405,511.40, 608,007.90 and 168,948.20 is: 253,314.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,511.40 : 608,007.90 = 168,948.20 : x
  2. Step 2: Convert to fraction form
    405,511.40/608,007.90 = 168,948.20/x
  3. Step 3: Cross multiply
    405,511.40x = 608,007.90 × 168,948.20
  4. Step 4: Simplify right side
    405,511.40x = 102,721,840,290.78
  5. Step 5: Solve for x
    x = 102,721,840,290.78/405,511.40
  6. Step 6: Final answer
    x = 253,314.31

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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.