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Finding the Fourth Proportional to 551,805.57, 761,506.86 and 310,110.18

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Solution

The fourth proportional to 551,805.57, 761,506.86 and 310,110.18 is: 427,960.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,805.57 : 761,506.86 = 310,110.18 : x
  2. Step 2: Convert to fraction form
    551,805.57/761,506.86 = 310,110.18/x
  3. Step 3: Cross multiply
    551,805.57x = 761,506.86 × 310,110.18
  4. Step 4: Simplify right side
    551,805.57x = 236,151,029,425.84
  5. Step 5: Solve for x
    x = 236,151,029,425.84/551,805.57
  6. Step 6: Final answer
    x = 427,960.58

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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.