Home / 328,725.28-490,709.64-288,867.04

Finding the Fourth Proportional to 328,725.28, 490,709.64 and 288,867.04

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Solution

The fourth proportional to 328,725.28, 490,709.64 and 288,867.04 is: 431,210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,725.28 : 490,709.64 = 288,867.04 : x
  2. Step 2: Convert to fraction form
    328,725.28/490,709.64 = 288,867.04/x
  3. Step 3: Cross multiply
    328,725.28x = 490,709.64 × 288,867.04
  4. Step 4: Simplify right side
    328,725.28x = 141,749,841,206.27
  5. Step 5: Solve for x
    x = 141,749,841,206.27/328,725.28
  6. Step 6: Final answer
    x = 431,210.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.