Home / 687,740.30-1,031,278.63-288,273.81

Finding the Fourth Proportional to 687,740.30, 1,031,278.63 and 288,273.81

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Solution

The fourth proportional to 687,740.30, 1,031,278.63 and 288,273.81 is: 432,271.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,740.30 : 1,031,278.63 = 288,273.81 : x
  2. Step 2: Convert to fraction form
    687,740.30/1,031,278.63 = 288,273.81/x
  3. Step 3: Cross multiply
    687,740.30x = 1,031,278.63 × 288,273.81
  4. Step 4: Simplify right side
    687,740.30x = 297,290,619,841.68
  5. Step 5: Solve for x
    x = 297,290,619,841.68/687,740.30
  6. Step 6: Final answer
    x = 432,271.63

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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.