Home / 1,320,990.16-1,980,140.28-521,173.84

Finding the Fourth Proportional to 1,320,990.16, 1,980,140.28 and 521,173.84

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Solution

The fourth proportional to 1,320,990.16, 1,980,140.28 and 521,173.84 is: 781,230.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,990.16 : 1,980,140.28 = 521,173.84 : x
  2. Step 2: Convert to fraction form
    1,320,990.16/1,980,140.28 = 521,173.84/x
  3. Step 3: Cross multiply
    1,320,990.16x = 1,980,140.28 × 521,173.84
  4. Step 4: Simplify right side
    1,320,990.16x = 1,031,997,313,466.28
  5. Step 5: Solve for x
    x = 1,031,997,313,466.28/1,320,990.16
  6. Step 6: Final answer
    x = 781,230.13

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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.