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Finding the Fourth Proportional to 303,421.80, 424,003.20 and 303,421.80

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Solution

The fourth proportional to 303,421.80, 424,003.20 and 303,421.80 is: 424,003.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,421.80 : 424,003.20 = 303,421.80 : x
  2. Step 2: Convert to fraction form
    303,421.80/424,003.20 = 303,421.80/x
  3. Step 3: Cross multiply
    303,421.80x = 424,003.20 × 303,421.80
  4. Step 4: Simplify right side
    303,421.80x = 128,651,814,149.76
  5. Step 5: Solve for x
    x = 128,651,814,149.76/303,421.80
  6. Step 6: Final answer
    x = 424,003.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.