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Finding the Fourth Proportional to 340,421.40, 510,632.10 and 303,679.80

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Solution

The fourth proportional to 340,421.40, 510,632.10 and 303,679.80 is: 455,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,421.40 : 510,632.10 = 303,679.80 : x
  2. Step 2: Convert to fraction form
    340,421.40/510,632.10 = 303,679.80/x
  3. Step 3: Cross multiply
    340,421.40x = 510,632.10 × 303,679.80
  4. Step 4: Simplify right side
    340,421.40x = 155,068,654,001.58
  5. Step 5: Solve for x
    x = 155,068,654,001.58/340,421.40
  6. Step 6: Final answer
    x = 455,519.70

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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.