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Finding the Fourth Proportional to 561,143.70, 841,715.55 and 372,186.90

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Solution

The fourth proportional to 561,143.70, 841,715.55 and 372,186.90 is: 558,280.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,143.70 : 841,715.55 = 372,186.90 : x
  2. Step 2: Convert to fraction form
    561,143.70/841,715.55 = 372,186.90/x
  3. Step 3: Cross multiply
    561,143.70x = 841,715.55 × 372,186.90
  4. Step 4: Simplify right side
    561,143.70x = 313,275,501,236.30
  5. Step 5: Solve for x
    x = 313,275,501,236.30/561,143.70
  6. Step 6: Final answer
    x = 558,280.35

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Double scale
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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.