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Finding the Fourth Proportional to 486,511.80, 727,799.40 and 427,462.80

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Solution

The fourth proportional to 486,511.80, 727,799.40 and 427,462.80 is: 639,464.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,511.80 : 727,799.40 = 427,462.80 : x
  2. Step 2: Convert to fraction form
    486,511.80/727,799.40 = 427,462.80/x
  3. Step 3: Cross multiply
    486,511.80x = 727,799.40 × 427,462.80
  4. Step 4: Simplify right side
    486,511.80x = 311,107,169,362.32
  5. Step 5: Solve for x
    x = 311,107,169,362.32/486,511.80
  6. Step 6: Final answer
    x = 639,464.80

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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.