Home / 651,200.20-976,800.30-438,623.80

Finding the Fourth Proportional to 651,200.20, 976,800.30 and 438,623.80

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Solution

The fourth proportional to 651,200.20, 976,800.30 and 438,623.80 is: 657,935.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,200.20 : 976,800.30 = 438,623.80 : x
  2. Step 2: Convert to fraction form
    651,200.20/976,800.30 = 438,623.80/x
  3. Step 3: Cross multiply
    651,200.20x = 976,800.30 × 438,623.80
  4. Step 4: Simplify right side
    651,200.20x = 428,447,859,427.14
  5. Step 5: Solve for x
    x = 428,447,859,427.14/651,200.20
  6. Step 6: Final answer
    x = 657,935.70

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Half scale
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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.