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Finding the Fourth Proportional to 561,614.40, 842,421.60 and 558,115.20

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Solution

The fourth proportional to 561,614.40, 842,421.60 and 558,115.20 is: 837,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,614.40 : 842,421.60 = 558,115.20 : x
  2. Step 2: Convert to fraction form
    561,614.40/842,421.60 = 558,115.20/x
  3. Step 3: Cross multiply
    561,614.40x = 842,421.60 × 558,115.20
  4. Step 4: Simplify right side
    561,614.40x = 470,168,299,768.32
  5. Step 5: Solve for x
    x = 470,168,299,768.32/561,614.40
  6. Step 6: Final answer
    x = 837,172.80

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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.