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Finding the Fourth Proportional to 666,680.12, 920,021.00 and 360,756.50

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Solution

The fourth proportional to 666,680.12, 920,021.00 and 360,756.50 is: 497,845.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,680.12 : 920,021.00 = 360,756.50 : x
  2. Step 2: Convert to fraction form
    666,680.12/920,021.00 = 360,756.50/x
  3. Step 3: Cross multiply
    666,680.12x = 920,021.00 × 360,756.50
  4. Step 4: Simplify right side
    666,680.12x = 331,903,560,689.42
  5. Step 5: Solve for x
    x = 331,903,560,689.42/666,680.12
  6. Step 6: Final answer
    x = 497,845.29

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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.