Home / 687,530.16-1,031,279.04-405,012.42

Finding the Fourth Proportional to 687,530.16, 1,031,279.04 and 405,012.42

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Solution

The fourth proportional to 687,530.16, 1,031,279.04 and 405,012.42 is: 607,509.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,530.16 : 1,031,279.04 = 405,012.42 : x
  2. Step 2: Convert to fraction form
    687,530.16/1,031,279.04 = 405,012.42/x
  3. Step 3: Cross multiply
    687,530.16x = 1,031,279.04 × 405,012.42
  4. Step 4: Simplify right side
    687,530.16x = 417,680,819,685.68
  5. Step 5: Solve for x
    x = 417,680,819,685.68/687,530.16
  6. Step 6: Final answer
    x = 607,509.09

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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.