Home / 280,854.32-387,587.40-153,536.72

Finding the Fourth Proportional to 280,854.32, 387,587.40 and 153,536.72

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Solution

The fourth proportional to 280,854.32, 387,587.40 and 153,536.72 is: 211,885.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,854.32 : 387,587.40 = 153,536.72 : x
  2. Step 2: Convert to fraction form
    280,854.32/387,587.40 = 153,536.72/x
  3. Step 3: Cross multiply
    280,854.32x = 387,587.40 × 153,536.72
  4. Step 4: Simplify right side
    280,854.32x = 59,508,898,109.33
  5. Step 5: Solve for x
    x = 59,508,898,109.33/280,854.32
  6. Step 6: Final answer
    x = 211,885.29

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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.