Home / 405,568,015.40-608,352,023.10-391,235,292.20

Finding the Fourth Proportional to 405,568,015.40, 608,352,023.10 and 391,235,292.20

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Solution

The fourth proportional to 405,568,015.40, 608,352,023.10 and 391,235,292.20 is: 586,852,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,568,015.40 : 608,352,023.10 = 391,235,292.20 : x
  2. Step 2: Convert to fraction form
    405,568,015.40/608,352,023.10 = 391,235,292.20/x
  3. Step 3: Cross multiply
    405,568,015.40x = 608,352,023.10 × 391,235,292.20
  4. Step 4: Simplify right side
    405,568,015.40x = 238,008,781,517,989,664
  5. Step 5: Solve for x
    x = 238,008,781,517,989,664/405,568,015.40
  6. Step 6: Final answer
    x = 586,852,938.30

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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.