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Finding the Fourth Proportional to 666,680.37, 920,021.35 and 360,756.76

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Solution

The fourth proportional to 666,680.37, 920,021.35 and 360,756.76 is: 497,845.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,680.37 : 920,021.35 = 360,756.76 : x
  2. Step 2: Convert to fraction form
    666,680.37/920,021.35 = 360,756.76/x
  3. Step 3: Cross multiply
    666,680.37x = 920,021.35 × 360,756.76
  4. Step 4: Simplify right side
    666,680.37x = 331,903,916,756.72
  5. Step 5: Solve for x
    x = 331,903,916,756.72/666,680.37
  6. Step 6: Final answer
    x = 497,845.64

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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.