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Finding the Fourth Proportional to 636,459.04, 878,316.60 and 349,997.68

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Solution

The fourth proportional to 636,459.04, 878,316.60 and 349,997.68 is: 482,998.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,459.04 : 878,316.60 = 349,997.68 : x
  2. Step 2: Convert to fraction form
    636,459.04/878,316.60 = 349,997.68/x
  3. Step 3: Cross multiply
    636,459.04x = 878,316.60 × 349,997.68
  4. Step 4: Simplify right side
    636,459.04x = 307,408,772,305.49
  5. Step 5: Solve for x
    x = 307,408,772,305.49/636,459.04
  6. Step 6: Final answer
    x = 482,998.52

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Half scale
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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.