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Finding the Fourth Proportional to 551,885.13, 761,664.40 and 306,894.15

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Solution

The fourth proportional to 551,885.13, 761,664.40 and 306,894.15 is: 423,548.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,885.13 : 761,664.40 = 306,894.15 : x
  2. Step 2: Convert to fraction form
    551,885.13/761,664.40 = 306,894.15/x
  3. Step 3: Cross multiply
    551,885.13x = 761,664.40 × 306,894.15
  4. Step 4: Simplify right side
    551,885.13x = 233,750,347,856.03
  5. Step 5: Solve for x
    x = 233,750,347,856.03/551,885.13
  6. Step 6: Final answer
    x = 423,548.91

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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.