Home / 919,904.10-1,379,856.15-320,666.10

Finding the Fourth Proportional to 919,904.10, 1,379,856.15 and 320,666.10

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Solution

The fourth proportional to 919,904.10, 1,379,856.15 and 320,666.10 is: 480,999.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,904.10 : 1,379,856.15 = 320,666.10 : x
  2. Step 2: Convert to fraction form
    919,904.10/1,379,856.15 = 320,666.10/x
  3. Step 3: Cross multiply
    919,904.10x = 1,379,856.15 × 320,666.10
  4. Step 4: Simplify right side
    919,904.10x = 442,473,090,181.52
  5. Step 5: Solve for x
    x = 442,473,090,181.52/919,904.10
  6. Step 6: Final answer
    x = 480,999.15

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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.