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Finding the Fourth Proportional to 660,279.40, 987,794.70 and 572,507.80

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Solution

The fourth proportional to 660,279.40, 987,794.70 and 572,507.80 is: 856,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,279.40 : 987,794.70 = 572,507.80 : x
  2. Step 2: Convert to fraction form
    660,279.40/987,794.70 = 572,507.80/x
  3. Step 3: Cross multiply
    660,279.40x = 987,794.70 × 572,507.80
  4. Step 4: Simplify right side
    660,279.40x = 565,520,170,548.66
  5. Step 5: Solve for x
    x = 565,520,170,548.66/660,279.40
  6. Step 6: Final answer
    x = 856,486.16

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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.