Home / 687,207.20-1,031,588.40-406,882.40

Finding the Fourth Proportional to 687,207.20, 1,031,588.40 and 406,882.40

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Solution

The fourth proportional to 687,207.20, 1,031,588.40 and 406,882.40 is: 610,784.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,207.20 : 1,031,588.40 = 406,882.40 : x
  2. Step 2: Convert to fraction form
    687,207.20/1,031,588.40 = 406,882.40/x
  3. Step 3: Cross multiply
    687,207.20x = 1,031,588.40 × 406,882.40
  4. Step 4: Simplify right side
    687,207.20x = 419,735,164,004.16
  5. Step 5: Solve for x
    x = 419,735,164,004.16/687,207.20
  6. Step 6: Final answer
    x = 610,784.00

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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.