Home / 687,751.83-1,031,660.55-288,405.63

Finding the Fourth Proportional to 687,751.83, 1,031,660.55 and 288,405.63

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Solution

The fourth proportional to 687,751.83, 1,031,660.55 and 288,405.63 is: 432,622.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,751.83 : 1,031,660.55 = 288,405.63 : x
  2. Step 2: Convert to fraction form
    687,751.83/1,031,660.55 = 288,405.63/x
  3. Step 3: Cross multiply
    687,751.83x = 1,031,660.55 × 288,405.63
  4. Step 4: Simplify right side
    687,751.83x = 297,536,710,868.90
  5. Step 5: Solve for x
    x = 297,536,710,868.90/687,751.83
  6. Step 6: Final answer
    x = 432,622.20

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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.