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Finding the Fourth Proportional to 638,157.40, 956,361.30 and 520,059.40

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Solution

The fourth proportional to 638,157.40, 956,361.30 and 520,059.40 is: 779,376.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,157.40 : 956,361.30 = 520,059.40 : x
  2. Step 2: Convert to fraction form
    638,157.40/956,361.30 = 520,059.40/x
  3. Step 3: Cross multiply
    638,157.40x = 956,361.30 × 520,059.40
  4. Step 4: Simplify right side
    638,157.40x = 497,364,683,861.22
  5. Step 5: Solve for x
    x = 497,364,683,861.22/638,157.40
  6. Step 6: Final answer
    x = 779,376.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.