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Finding the Fourth Proportional to 318,673.64, 478,026.30 and 91,002.98

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Solution

The fourth proportional to 318,673.64, 478,026.30 and 91,002.98 is: 136,508.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,673.64 : 478,026.30 = 91,002.98 : x
  2. Step 2: Convert to fraction form
    318,673.64/478,026.30 = 91,002.98/x
  3. Step 3: Cross multiply
    318,673.64x = 478,026.30 × 91,002.98
  4. Step 4: Simplify right side
    318,673.64x = 43,501,817,818.37
  5. Step 5: Solve for x
    x = 43,501,817,818.37/318,673.64
  6. Step 6: Final answer
    x = 136,508.99

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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.