Home / 280,676.21-387,328.65-153,349.07

Finding the Fourth Proportional to 280,676.21, 387,328.65 and 153,349.07

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Solution

The fourth proportional to 280,676.21, 387,328.65 and 153,349.07 is: 211,619.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,676.21 : 387,328.65 = 153,349.07 : x
  2. Step 2: Convert to fraction form
    280,676.21/387,328.65 = 153,349.07/x
  3. Step 3: Cross multiply
    280,676.21x = 387,328.65 × 153,349.07
  4. Step 4: Simplify right side
    280,676.21x = 59,396,488,261.86
  5. Step 5: Solve for x
    x = 59,396,488,261.86/280,676.21
  6. Step 6: Final answer
    x = 211,619.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.