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Finding the Fourth Proportional to 479,071.69, 660,512.36 and 315,702.79

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Solution

The fourth proportional to 479,071.69, 660,512.36 and 315,702.79 is: 435,270.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,071.69 : 660,512.36 = 315,702.79 : x
  2. Step 2: Convert to fraction form
    479,071.69/660,512.36 = 315,702.79/x
  3. Step 3: Cross multiply
    479,071.69x = 660,512.36 × 315,702.79
  4. Step 4: Simplify right side
    479,071.69x = 208,525,591,578.92
  5. Step 5: Solve for x
    x = 208,525,591,578.92/479,071.69
  6. Step 6: Final answer
    x = 435,270.12

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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.