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Finding the Fourth Proportional to 666,905.42, 920,329.35 and 360,981.74

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Solution

The fourth proportional to 666,905.42, 920,329.35 and 360,981.74 is: 498,154.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,905.42 : 920,329.35 = 360,981.74 : x
  2. Step 2: Convert to fraction form
    666,905.42/920,329.35 = 360,981.74/x
  3. Step 3: Cross multiply
    666,905.42x = 920,329.35 × 360,981.74
  4. Step 4: Simplify right side
    666,905.42x = 332,222,090,136.07
  5. Step 5: Solve for x
    x = 332,222,090,136.07/666,905.42
  6. Step 6: Final answer
    x = 498,154.73

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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.