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Finding the Fourth Proportional to 666,719.18, 920,072.45 and 360,795.56

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Solution

The fourth proportional to 666,719.18, 920,072.45 and 360,795.56 is: 497,897.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,719.18 : 920,072.45 = 360,795.56 : x
  2. Step 2: Convert to fraction form
    666,719.18/920,072.45 = 360,795.56/x
  3. Step 3: Cross multiply
    666,719.18x = 920,072.45 × 360,795.56
  4. Step 4: Simplify right side
    666,719.18x = 331,958,054,838.32
  5. Step 5: Solve for x
    x = 331,958,054,838.32/666,719.18
  6. Step 6: Final answer
    x = 497,897.86

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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.