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Finding the Fourth Proportional to 561,407.80, 842,118.90 and 187,430.80

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Solution

The fourth proportional to 561,407.80, 842,118.90 and 187,430.80 is: 281,148.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,407.80 : 842,118.90 = 187,430.80 : x
  2. Step 2: Convert to fraction form
    561,407.80/842,118.90 = 187,430.80/x
  3. Step 3: Cross multiply
    561,407.80x = 842,118.90 × 187,430.80
  4. Step 4: Simplify right side
    561,407.80x = 157,839,019,122.12
  5. Step 5: Solve for x
    x = 157,839,019,122.12/561,407.80
  6. Step 6: Final answer
    x = 281,148.60

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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.