Home / 687,740.10-1,031,610.15-214,421.70

Finding the Fourth Proportional to 687,740.10, 1,031,610.15 and 214,421.70

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Solution

The fourth proportional to 687,740.10, 1,031,610.15 and 214,421.70 is: 321,632.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,740.10 : 1,031,610.15 = 214,421.70 : x
  2. Step 2: Convert to fraction form
    687,740.10/1,031,610.15 = 214,421.70/x
  3. Step 3: Cross multiply
    687,740.10x = 1,031,610.15 × 214,421.70
  4. Step 4: Simplify right side
    687,740.10x = 221,199,602,100.26
  5. Step 5: Solve for x
    x = 221,199,602,100.26/687,740.10
  6. Step 6: Final answer
    x = 321,632.55

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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.