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Finding the Fourth Proportional to 390,048.80, 547,249.30 and 390,048.80

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Solution

The fourth proportional to 390,048.80, 547,249.30 and 390,048.80 is: 547,249.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,048.80 : 547,249.30 = 390,048.80 : x
  2. Step 2: Convert to fraction form
    390,048.80/547,249.30 = 390,048.80/x
  3. Step 3: Cross multiply
    390,048.80x = 547,249.30 × 390,048.80
  4. Step 4: Simplify right side
    390,048.80x = 213,453,932,765.84
  5. Step 5: Solve for x
    x = 213,453,932,765.84/390,048.80
  6. Step 6: Final answer
    x = 547,249.30

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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.