Home / 848,105.40-1,272,158.10-428,201.40

Finding the Fourth Proportional to 848,105.40, 1,272,158.10 and 428,201.40

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Solution

The fourth proportional to 848,105.40, 1,272,158.10 and 428,201.40 is: 642,302.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    848,105.40 : 1,272,158.10 = 428,201.40 : x
  2. Step 2: Convert to fraction form
    848,105.40/1,272,158.10 = 428,201.40/x
  3. Step 3: Cross multiply
    848,105.40x = 1,272,158.10 × 428,201.40
  4. Step 4: Simplify right side
    848,105.40x = 544,739,879,441.34
  5. Step 5: Solve for x
    x = 544,739,879,441.34/848,105.40
  6. Step 6: Final answer
    x = 642,302.10

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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.