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Finding the Fourth Proportional to 666,766.08, 920,127.74 and 380,290.95

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Solution

The fourth proportional to 666,766.08, 920,127.74 and 380,290.95 is: 524,796.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,766.08 : 920,127.74 = 380,290.95 : x
  2. Step 2: Convert to fraction form
    666,766.08/920,127.74 = 380,290.95/x
  3. Step 3: Cross multiply
    666,766.08x = 920,127.74 × 380,290.95
  4. Step 4: Simplify right side
    666,766.08x = 349,916,250,464.50
  5. Step 5: Solve for x
    x = 349,916,250,464.50/666,766.08
  6. Step 6: Final answer
    x = 524,796.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.