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Finding the Fourth Proportional to 666,979.13, 920,431.20 and 365,173.13

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Solution

The fourth proportional to 666,979.13, 920,431.20 and 365,173.13 is: 503,938.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,979.13 : 920,431.20 = 365,173.13 : x
  2. Step 2: Convert to fraction form
    666,979.13/920,431.20 = 365,173.13/x
  3. Step 3: Cross multiply
    666,979.13x = 920,431.20 × 365,173.13
  4. Step 4: Simplify right side
    666,979.13x = 336,116,737,651.50
  5. Step 5: Solve for x
    x = 336,116,737,651.50/666,979.13
  6. Step 6: Final answer
    x = 503,938.92

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1.5x scale

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.