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Finding the Fourth Proportional to 838,691,319.15, 1,258,036,978.32 and 256,425,565.46

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Solution

The fourth proportional to 838,691,319.15, 1,258,036,978.32 and 256,425,565.46 is: 384,638,348.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,691,319.15 : 1,258,036,978.32 = 256,425,565.46 : x
  2. Step 2: Convert to fraction form
    838,691,319.15/1,258,036,978.32 = 256,425,565.46/x
  3. Step 3: Cross multiply
    838,691,319.15x = 1,258,036,978.32 × 256,425,565.46
  4. Step 4: Simplify right side
    838,691,319.15x = 322,592,843,529,005,568
  5. Step 5: Solve for x
    x = 322,592,843,529,005,568/838,691,319.15
  6. Step 6: Final answer
    x = 384,638,348.06

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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.