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Finding the Fourth Proportional to 385,529.90, 578,492.52 and 186,020.42

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Solution

The fourth proportional to 385,529.90, 578,492.52 and 186,020.42 is: 279,126.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,529.90 : 578,492.52 = 186,020.42 : x
  2. Step 2: Convert to fraction form
    385,529.90/578,492.52 = 186,020.42/x
  3. Step 3: Cross multiply
    385,529.90x = 578,492.52 × 186,020.42
  4. Step 4: Simplify right side
    385,529.90x = 107,611,421,537.26
  5. Step 5: Solve for x
    x = 107,611,421,537.26/385,529.90
  6. Step 6: Final answer
    x = 279,126.01

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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.