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Finding the Fourth Proportional to 636,210.48, 877,990.68 and 349,742.64

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Solution

The fourth proportional to 636,210.48, 877,990.68 and 349,742.64 is: 482,655.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,210.48 : 877,990.68 = 349,742.64 : x
  2. Step 2: Convert to fraction form
    636,210.48/877,990.68 = 349,742.64/x
  3. Step 3: Cross multiply
    636,210.48x = 877,990.68 × 349,742.64
  4. Step 4: Simplify right side
    636,210.48x = 307,070,778,318.60
  5. Step 5: Solve for x
    x = 307,070,778,318.60/636,210.48
  6. Step 6: Final answer
    x = 482,655.96

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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.