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Finding the Fourth Proportional to 587,004.20, 879,728.70 and 520,130.60

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Solution

The fourth proportional to 587,004.20, 879,728.70 and 520,130.60 is: 779,506.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,004.20 : 879,728.70 = 520,130.60 : x
  2. Step 2: Convert to fraction form
    587,004.20/879,728.70 = 520,130.60/x
  3. Step 3: Cross multiply
    587,004.20x = 879,728.70 × 520,130.60
  4. Step 4: Simplify right side
    587,004.20x = 457,573,816,568.22
  5. Step 5: Solve for x
    x = 457,573,816,568.22/587,004.20
  6. Step 6: Final answer
    x = 779,506.89

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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.