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Finding the Fourth Proportional to 561,707.40, 842,561.10 and 558,208.20

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Solution

The fourth proportional to 561,707.40, 842,561.10 and 558,208.20 is: 837,312.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,707.40 : 842,561.10 = 558,208.20 : x
  2. Step 2: Convert to fraction form
    561,707.40/842,561.10 = 558,208.20/x
  3. Step 3: Cross multiply
    561,707.40x = 842,561.10 × 558,208.20
  4. Step 4: Simplify right side
    561,707.40x = 470,324,515,021.02
  5. Step 5: Solve for x
    x = 470,324,515,021.02/561,707.40
  6. Step 6: Final answer
    x = 837,312.30

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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.