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Finding the Fourth Proportional to 810,720.96, 1,118,640.96 and 508,778.88

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Solution

The fourth proportional to 810,720.96, 1,118,640.96 and 508,778.88 is: 702,018.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,720.96 : 1,118,640.96 = 508,778.88 : x
  2. Step 2: Convert to fraction form
    810,720.96/1,118,640.96 = 508,778.88/x
  3. Step 3: Cross multiply
    810,720.96x = 1,118,640.96 × 508,778.88
  4. Step 4: Simplify right side
    810,720.96x = 569,140,894,750.93
  5. Step 5: Solve for x
    x = 569,140,894,750.93/810,720.96
  6. Step 6: Final answer
    x = 702,018.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.