Home / 1,605,812.50-2,216,021.25-890,420.50

Finding the Fourth Proportional to 1,605,812.50, 2,216,021.25 and 890,420.50

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Solution

The fourth proportional to 1,605,812.50, 2,216,021.25 and 890,420.50 is: 1,228,780.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605,812.50 : 2,216,021.25 = 890,420.50 : x
  2. Step 2: Convert to fraction form
    1,605,812.50/2,216,021.25 = 890,420.50/x
  3. Step 3: Cross multiply
    1,605,812.50x = 2,216,021.25 × 890,420.50
  4. Step 4: Simplify right side
    1,605,812.50x = 1,973,190,749,435.63
  5. Step 5: Solve for x
    x = 1,973,190,749,435.63/1,605,812.50
  6. Step 6: Final answer
    x = 1,228,780.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.