Home / 763,319.10-1,143,999.45-426,359.10

Finding the Fourth Proportional to 763,319.10, 1,143,999.45 and 426,359.10

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Solution

The fourth proportional to 763,319.10, 1,143,999.45 and 426,359.10 is: 638,991.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,319.10 : 1,143,999.45 = 426,359.10 : x
  2. Step 2: Convert to fraction form
    763,319.10/1,143,999.45 = 426,359.10/x
  3. Step 3: Cross multiply
    763,319.10x = 1,143,999.45 × 426,359.10
  4. Step 4: Simplify right side
    763,319.10x = 487,754,575,902.50
  5. Step 5: Solve for x
    x = 487,754,575,902.50/763,319.10
  6. Step 6: Final answer
    x = 638,991.71

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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.