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Finding the Fourth Proportional to 890,178, 1,228,445.64 and 487,761.36

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Solution

The fourth proportional to 890,178, 1,228,445.64 and 487,761.36 is: 673,110.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,178 : 1,228,445.64 = 487,761.36 : x
  2. Step 2: Convert to fraction form
    890,178/1,228,445.64 = 487,761.36/x
  3. Step 3: Cross multiply
    890,178x = 1,228,445.64 × 487,761.36
  4. Step 4: Simplify right side
    890,178x = 599,188,316,052.47
  5. Step 5: Solve for x
    x = 599,188,316,052.47/890,178
  6. Step 6: Final answer
    x = 673,110.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.