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Finding the Fourth Proportional to 628,702.51, 943,054.06 and 207,978.38

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Solution

The fourth proportional to 628,702.51, 943,054.06 and 207,978.38 is: 311,967.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,702.51 : 943,054.06 = 207,978.38 : x
  2. Step 2: Convert to fraction form
    628,702.51/943,054.06 = 207,978.38/x
  3. Step 3: Cross multiply
    628,702.51x = 943,054.06 × 207,978.38
  4. Step 4: Simplify right side
    628,702.51x = 196,134,855,651.22
  5. Step 5: Solve for x
    x = 196,134,855,651.22/628,702.51
  6. Step 6: Final answer
    x = 311,967.67

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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.