Home / 1,390,542.90-2,087,162.46-671,391.76

Finding the Fourth Proportional to 1,390,542.90, 2,087,162.46 and 671,391.76

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Solution

The fourth proportional to 1,390,542.90, 2,087,162.46 and 671,391.76 is: 1,007,738.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,542.90 : 2,087,162.46 = 671,391.76 : x
  2. Step 2: Convert to fraction form
    1,390,542.90/2,087,162.46 = 671,391.76/x
  3. Step 3: Cross multiply
    1,390,542.90x = 2,087,162.46 × 671,391.76
  4. Step 4: Simplify right side
    1,390,542.90x = 1,401,303,683,879.29
  5. Step 5: Solve for x
    x = 1,401,303,683,879.29/1,390,542.90
  6. Step 6: Final answer
    x = 1,007,738.55

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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.