Home / 328,731.12-490,718.59-288,873.12

Finding the Fourth Proportional to 328,731.12, 490,718.59 and 288,873.12

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Solution

The fourth proportional to 328,731.12, 490,718.59 and 288,873.12 is: 431,219.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,731.12 : 490,718.59 = 288,873.12 : x
  2. Step 2: Convert to fraction form
    328,731.12/490,718.59 = 288,873.12/x
  3. Step 3: Cross multiply
    328,731.12x = 490,718.59 × 288,873.12
  4. Step 4: Simplify right side
    328,731.12x = 141,755,410,135.30
  5. Step 5: Solve for x
    x = 141,755,410,135.30/328,731.12
  6. Step 6: Final answer
    x = 431,219.93

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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.