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Finding the Fourth Proportional to 538,148.40, 808,000.20 and 405,956.40

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Solution

The fourth proportional to 538,148.40, 808,000.20 and 405,956.40 is: 609,521.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,148.40 : 808,000.20 = 405,956.40 : x
  2. Step 2: Convert to fraction form
    538,148.40/808,000.20 = 405,956.40/x
  3. Step 3: Cross multiply
    538,148.40x = 808,000.20 × 405,956.40
  4. Step 4: Simplify right side
    538,148.40x = 328,012,852,391.28
  5. Step 5: Solve for x
    x = 328,012,852,391.28/538,148.40
  6. Step 6: Final answer
    x = 609,521.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.