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Finding the Fourth Proportional to 660,605.49, 911,630.57 and 358,801.65

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Solution

The fourth proportional to 660,605.49, 911,630.57 and 358,801.65 is: 495,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,605.49 : 911,630.57 = 358,801.65 : x
  2. Step 2: Convert to fraction form
    660,605.49/911,630.57 = 358,801.65/x
  3. Step 3: Cross multiply
    660,605.49x = 911,630.57 × 358,801.65
  4. Step 4: Simplify right side
    660,605.49x = 327,094,550,912.43
  5. Step 5: Solve for x
    x = 327,094,550,912.43/660,605.49
  6. Step 6: Final answer
    x = 495,143.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.