Home / 687,061.79-1,030,109.78-302,628.20

Finding the Fourth Proportional to 687,061.79, 1,030,109.78 and 302,628.20

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Solution

The fourth proportional to 687,061.79, 1,030,109.78 and 302,628.20 is: 453,729.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,061.79 : 1,030,109.78 = 302,628.20 : x
  2. Step 2: Convert to fraction form
    687,061.79/1,030,109.78 = 302,628.20/x
  3. Step 3: Cross multiply
    687,061.79x = 1,030,109.78 × 302,628.20
  4. Step 4: Simplify right side
    687,061.79x = 311,740,268,523.80
  5. Step 5: Solve for x
    x = 311,740,268,523.80/687,061.79
  6. Step 6: Final answer
    x = 453,729.60

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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.