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Finding the Fourth Proportional to 553,915.08, 764,402.40 and 299,266.20

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Solution

The fourth proportional to 553,915.08, 764,402.40 and 299,266.20 is: 412,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,915.08 : 764,402.40 = 299,266.20 : x
  2. Step 2: Convert to fraction form
    553,915.08/764,402.40 = 299,266.20/x
  3. Step 3: Cross multiply
    553,915.08x = 764,402.40 × 299,266.20
  4. Step 4: Simplify right side
    553,915.08x = 228,759,801,518.88
  5. Step 5: Solve for x
    x = 228,759,801,518.88/553,915.08
  6. Step 6: Final answer
    x = 412,987.13

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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.