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Finding the Fourth Proportional to 385,380.90, 578,071.35 and 367,010.10

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Solution

The fourth proportional to 385,380.90, 578,071.35 and 367,010.10 is: 550,515.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,380.90 : 578,071.35 = 367,010.10 : x
  2. Step 2: Convert to fraction form
    385,380.90/578,071.35 = 367,010.10/x
  3. Step 3: Cross multiply
    385,380.90x = 578,071.35 × 367,010.10
  4. Step 4: Simplify right side
    385,380.90x = 212,158,023,970.64
  5. Step 5: Solve for x
    x = 212,158,023,970.64/385,380.90
  6. Step 6: Final answer
    x = 550,515.15

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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.