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Finding the Fourth Proportional to 705,420.42, 973,487.21 and 383,136.81

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Solution

The fourth proportional to 705,420.42, 973,487.21 and 383,136.81 is: 528,732.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,420.42 : 973,487.21 = 383,136.81 : x
  2. Step 2: Convert to fraction form
    705,420.42/973,487.21 = 383,136.81/x
  3. Step 3: Cross multiply
    705,420.42x = 973,487.21 × 383,136.81
  4. Step 4: Simplify right side
    705,420.42x = 372,978,784,215.20
  5. Step 5: Solve for x
    x = 372,978,784,215.20/705,420.42
  6. Step 6: Final answer
    x = 528,732.62

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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.