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Finding the Fourth Proportional to 608,087.72, 912,280.25 and 428,523.41

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Solution

The fourth proportional to 608,087.72, 912,280.25 and 428,523.41 is: 642,889.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,087.72 : 912,280.25 = 428,523.41 : x
  2. Step 2: Convert to fraction form
    608,087.72/912,280.25 = 428,523.41/x
  3. Step 3: Cross multiply
    608,087.72x = 912,280.25 × 428,523.41
  4. Step 4: Simplify right side
    608,087.72x = 390,933,446,957.66
  5. Step 5: Solve for x
    x = 390,933,446,957.66/608,087.72
  6. Step 6: Final answer
    x = 642,889.89

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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.