Home / 1,223,139.02-1,687,987.89-679,277.21

Finding the Fourth Proportional to 1,223,139.02, 1,687,987.89 and 679,277.21

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Solution

The fourth proportional to 1,223,139.02, 1,687,987.89 and 679,277.21 is: 937,433.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,139.02 : 1,687,987.89 = 679,277.21 : x
  2. Step 2: Convert to fraction form
    1,223,139.02/1,687,987.89 = 679,277.21/x
  3. Step 3: Cross multiply
    1,223,139.02x = 1,687,987.89 × 679,277.21
  4. Step 4: Simplify right side
    1,223,139.02x = 1,146,611,695,993.05
  5. Step 5: Solve for x
    x = 1,146,611,695,993.05/1,223,139.02
  6. Step 6: Final answer
    x = 937,433.67

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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.