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Finding the Fourth Proportional to 666,993.96, 920,223.18 and 380,307.96

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Solution

The fourth proportional to 666,993.96, 920,223.18 and 380,307.96 is: 524,694.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,993.96 : 920,223.18 = 380,307.96 : x
  2. Step 2: Convert to fraction form
    666,993.96/920,223.18 = 380,307.96/x
  3. Step 3: Cross multiply
    666,993.96x = 920,223.18 × 380,307.96
  4. Step 4: Simplify right side
    666,993.96x = 349,968,200,330.51
  5. Step 5: Solve for x
    x = 349,968,200,330.51/666,993.96
  6. Step 6: Final answer
    x = 524,694.71

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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.