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Finding the Fourth Proportional to 553,536.72, 763,877.30 and 311,897.12

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Solution

The fourth proportional to 553,536.72, 763,877.30 and 311,897.12 is: 430,416.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,536.72 : 763,877.30 = 311,897.12 : x
  2. Step 2: Convert to fraction form
    553,536.72/763,877.30 = 311,897.12/x
  3. Step 3: Cross multiply
    553,536.72x = 763,877.30 × 311,897.12
  4. Step 4: Simplify right side
    553,536.72x = 238,251,124,524.50
  5. Step 5: Solve for x
    x = 238,251,124,524.50/553,536.72
  6. Step 6: Final answer
    x = 430,416.11

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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.