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Finding the Fourth Proportional to 405,993.40, 608,730.90 and 169,430.20

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Solution

The fourth proportional to 405,993.40, 608,730.90 and 169,430.20 is: 254,037.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,993.40 : 608,730.90 = 169,430.20 : x
  2. Step 2: Convert to fraction form
    405,993.40/608,730.90 = 169,430.20/x
  3. Step 3: Cross multiply
    405,993.40x = 608,730.90 × 169,430.20
  4. Step 4: Simplify right side
    405,993.40x = 103,137,398,133.18
  5. Step 5: Solve for x
    x = 103,137,398,133.18/405,993.40
  6. Step 6: Final answer
    x = 254,037.13

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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.