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Finding the Fourth Proportional to 331,543.80, 497,315.70 and 279,055.80

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Solution

The fourth proportional to 331,543.80, 497,315.70 and 279,055.80 is: 418,583.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,543.80 : 497,315.70 = 279,055.80 : x
  2. Step 2: Convert to fraction form
    331,543.80/497,315.70 = 279,055.80/x
  3. Step 3: Cross multiply
    331,543.80x = 497,315.70 × 279,055.80
  4. Step 4: Simplify right side
    331,543.80x = 138,778,830,516.06
  5. Step 5: Solve for x
    x = 138,778,830,516.06/331,543.80
  6. Step 6: Final answer
    x = 418,583.70

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1.5x scale

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.