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Finding the Fourth Proportional to 661,559.20, 992,031.60 and 287,389.60

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Solution

The fourth proportional to 661,559.20, 992,031.60 and 287,389.60 is: 430,950.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,559.20 : 992,031.60 = 287,389.60 : x
  2. Step 2: Convert to fraction form
    661,559.20/992,031.60 = 287,389.60/x
  3. Step 3: Cross multiply
    661,559.20x = 992,031.60 × 287,389.60
  4. Step 4: Simplify right side
    661,559.20x = 285,099,564,711.36
  5. Step 5: Solve for x
    x = 285,099,564,711.36/661,559.20
  6. Step 6: Final answer
    x = 430,950.95

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1.5x scale

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.