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Finding the Fourth Proportional to 561,938.40, 842,907.60 and 558,439.20

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Solution

The fourth proportional to 561,938.40, 842,907.60 and 558,439.20 is: 837,658.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,938.40 : 842,907.60 = 558,439.20 : x
  2. Step 2: Convert to fraction form
    561,938.40/842,907.60 = 558,439.20/x
  3. Step 3: Cross multiply
    561,938.40x = 842,907.60 × 558,439.20
  4. Step 4: Simplify right side
    561,938.40x = 470,712,645,817.92
  5. Step 5: Solve for x
    x = 470,712,645,817.92/561,938.40
  6. Step 6: Final answer
    x = 837,658.80

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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.