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Finding the Fourth Proportional to 636,459.54, 878,317.29 and 349,998.18

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Solution

The fourth proportional to 636,459.54, 878,317.29 and 349,998.18 is: 482,999.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,459.54 : 878,317.29 = 349,998.18 : x
  2. Step 2: Convert to fraction form
    636,459.54/878,317.29 = 349,998.18/x
  3. Step 3: Cross multiply
    636,459.54x = 878,317.29 × 349,998.18
  4. Step 4: Simplify right side
    636,459.54x = 307,409,452,962.53
  5. Step 5: Solve for x
    x = 307,409,452,962.53/636,459.54
  6. Step 6: Final answer
    x = 482,999.21

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.