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Finding the Fourth Proportional to 280,646.21, 420,675.27 and 130,762.91

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Solution

The fourth proportional to 280,646.21, 420,675.27 and 130,762.91 is: 196,007.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,646.21 : 420,675.27 = 130,762.91 : x
  2. Step 2: Convert to fraction form
    280,646.21/420,675.27 = 130,762.91/x
  3. Step 3: Cross multiply
    280,646.21x = 420,675.27 × 130,762.91
  4. Step 4: Simplify right side
    280,646.21x = 55,008,720,366.86
  5. Step 5: Solve for x
    x = 55,008,720,366.86/280,646.21
  6. Step 6: Final answer
    x = 196,007.36

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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.