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Finding the Fourth Proportional to 660,272.40, 987,784.20 and 572,500.80

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Solution

The fourth proportional to 660,272.40, 987,784.20 and 572,500.80 is: 856,475.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,272.40 : 987,784.20 = 572,500.80 : x
  2. Step 2: Convert to fraction form
    660,272.40/987,784.20 = 572,500.80/x
  3. Step 3: Cross multiply
    660,272.40x = 987,784.20 × 572,500.80
  4. Step 4: Simplify right side
    660,272.40x = 565,507,244,727.36
  5. Step 5: Solve for x
    x = 565,507,244,727.36/660,272.40
  6. Step 6: Final answer
    x = 856,475.67

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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.