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Finding the Fourth Proportional to 561,407.40, 842,111.10 and 187,430.40

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Solution

The fourth proportional to 561,407.40, 842,111.10 and 187,430.40 is: 281,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,407.40 : 842,111.10 = 187,430.40 : x
  2. Step 2: Convert to fraction form
    561,407.40/842,111.10 = 187,430.40/x
  3. Step 3: Cross multiply
    561,407.40x = 842,111.10 × 187,430.40
  4. Step 4: Simplify right side
    561,407.40x = 157,837,220,317.44
  5. Step 5: Solve for x
    x = 157,837,220,317.44/561,407.40
  6. Step 6: Final answer
    x = 281,145.60

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Similar ratio
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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.