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Finding the Fourth Proportional to 455,615.80, 683,423.70 and 429,371.80

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Solution

The fourth proportional to 455,615.80, 683,423.70 and 429,371.80 is: 644,057.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,615.80 : 683,423.70 = 429,371.80 : x
  2. Step 2: Convert to fraction form
    455,615.80/683,423.70 = 429,371.80/x
  3. Step 3: Cross multiply
    455,615.80x = 683,423.70 × 429,371.80
  4. Step 4: Simplify right side
    455,615.80x = 293,442,864,231.66
  5. Step 5: Solve for x
    x = 293,442,864,231.66/455,615.80
  6. Step 6: Final answer
    x = 644,057.70

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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.