Home / 687,739.30-1,031,277.13-288,272.81

Finding the Fourth Proportional to 687,739.30, 1,031,277.13 and 288,272.81

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Solution

The fourth proportional to 687,739.30, 1,031,277.13 and 288,272.81 is: 432,270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,739.30 : 1,031,277.13 = 288,272.81 : x
  2. Step 2: Convert to fraction form
    687,739.30/1,031,277.13 = 288,272.81/x
  3. Step 3: Cross multiply
    687,739.30x = 1,031,277.13 × 288,272.81
  4. Step 4: Simplify right side
    687,739.30x = 297,289,158,011.35
  5. Step 5: Solve for x
    x = 297,289,158,011.35/687,739.30
  6. Step 6: Final answer
    x = 432,270.13

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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.