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Finding the Fourth Proportional to 486,514.80, 727,803.90 and 427,465.80

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Solution

The fourth proportional to 486,514.80, 727,803.90 and 427,465.80 is: 639,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,514.80 : 727,803.90 = 427,465.80 : x
  2. Step 2: Convert to fraction form
    486,514.80/727,803.90 = 427,465.80/x
  3. Step 3: Cross multiply
    486,514.80x = 727,803.90 × 427,465.80
  4. Step 4: Simplify right side
    486,514.80x = 311,111,276,356.62
  5. Step 5: Solve for x
    x = 311,111,276,356.62/486,514.80
  6. Step 6: Final answer
    x = 639,469.30

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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.