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Finding the Fourth Proportional to 385,997.04, 578,925 and 105,511.68

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Solution

The fourth proportional to 385,997.04, 578,925 and 105,511.68 is: 158,248.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,997.04 : 578,925 = 105,511.68 : x
  2. Step 2: Convert to fraction form
    385,997.04/578,925 = 105,511.68/x
  3. Step 3: Cross multiply
    385,997.04x = 578,925 × 105,511.68
  4. Step 4: Simplify right side
    385,997.04x = 61,083,349,344.00
  5. Step 5: Solve for x
    x = 61,083,349,344.00/385,997.04
  6. Step 6: Final answer
    x = 158,248.23

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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.