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Finding the Fourth Proportional to 651,275.20, 976,912.80 and 438,698.80

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Solution

The fourth proportional to 651,275.20, 976,912.80 and 438,698.80 is: 658,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,275.20 : 976,912.80 = 438,698.80 : x
  2. Step 2: Convert to fraction form
    651,275.20/976,912.80 = 438,698.80/x
  3. Step 3: Cross multiply
    651,275.20x = 976,912.80 × 438,698.80
  4. Step 4: Simplify right side
    651,275.20x = 428,570,473,064.64
  5. Step 5: Solve for x
    x = 428,570,473,064.64/651,275.20
  6. Step 6: Final answer
    x = 658,048.20

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Double scale
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Similar ratio
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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.