Home / 687,608.10-1,031,412.15-392,696.10

Finding the Fourth Proportional to 687,608.10, 1,031,412.15 and 392,696.10

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Solution

The fourth proportional to 687,608.10, 1,031,412.15 and 392,696.10 is: 589,044.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,608.10 : 1,031,412.15 = 392,696.10 : x
  2. Step 2: Convert to fraction form
    687,608.10/1,031,412.15 = 392,696.10/x
  3. Step 3: Cross multiply
    687,608.10x = 1,031,412.15 × 392,696.10
  4. Step 4: Simplify right side
    687,608.10x = 405,031,528,797.62
  5. Step 5: Solve for x
    x = 405,031,528,797.62/687,608.10
  6. Step 6: Final answer
    x = 589,044.15

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1.5x scale

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.