Home / 687,841.80-1,031,762.70-214,526.40

Finding the Fourth Proportional to 687,841.80, 1,031,762.70 and 214,526.40

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Solution

The fourth proportional to 687,841.80, 1,031,762.70 and 214,526.40 is: 321,789.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,841.80 : 1,031,762.70 = 214,526.40 : x
  2. Step 2: Convert to fraction form
    687,841.80/1,031,762.70 = 214,526.40/x
  3. Step 3: Cross multiply
    687,841.80x = 1,031,762.70 × 214,526.40
  4. Step 4: Simplify right side
    687,841.80x = 221,340,337,685.28
  5. Step 5: Solve for x
    x = 221,340,337,685.28/687,841.80
  6. Step 6: Final answer
    x = 321,789.60

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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.