Home / 687,853.80-1,031,780.70-214,538.40

Finding the Fourth Proportional to 687,853.80, 1,031,780.70 and 214,538.40

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Solution

The fourth proportional to 687,853.80, 1,031,780.70 and 214,538.40 is: 321,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,853.80 : 1,031,780.70 = 214,538.40 : x
  2. Step 2: Convert to fraction form
    687,853.80/1,031,780.70 = 214,538.40/x
  3. Step 3: Cross multiply
    687,853.80x = 1,031,780.70 × 214,538.40
  4. Step 4: Simplify right side
    687,853.80x = 221,356,580,528.88
  5. Step 5: Solve for x
    x = 221,356,580,528.88/687,853.80
  6. Step 6: Final answer
    x = 321,807.60

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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.