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Finding the Fourth Proportional to 628,431.92, 942,647.88 and 517,390.64

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Solution

The fourth proportional to 628,431.92, 942,647.88 and 517,390.64 is: 776,085.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,431.92 : 942,647.88 = 517,390.64 : x
  2. Step 2: Convert to fraction form
    628,431.92/942,647.88 = 517,390.64/x
  3. Step 3: Cross multiply
    628,431.92x = 942,647.88 × 517,390.64
  4. Step 4: Simplify right side
    628,431.92x = 487,717,189,927.84
  5. Step 5: Solve for x
    x = 487,717,189,927.84/628,431.92
  6. Step 6: Final answer
    x = 776,085.96

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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.