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Finding the Fourth Proportional to 479,071.56, 660,512.19 and 315,702.66

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Solution

The fourth proportional to 479,071.56, 660,512.19 and 315,702.66 is: 435,269.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,071.56 : 660,512.19 = 315,702.66 : x
  2. Step 2: Convert to fraction form
    479,071.56/660,512.19 = 315,702.66/x
  3. Step 3: Cross multiply
    479,071.56x = 660,512.19 × 315,702.66
  4. Step 4: Simplify right side
    479,071.56x = 208,525,456,638.46
  5. Step 5: Solve for x
    x = 208,525,456,638.46/479,071.56
  6. Step 6: Final answer
    x = 435,269.95

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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.