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Finding the Fourth Proportional to 860,144.84, 1,187,040.39 and 478,178

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Solution

The fourth proportional to 860,144.84, 1,187,040.39 and 478,178 is: 659,908.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,144.84 : 1,187,040.39 = 478,178 : x
  2. Step 2: Convert to fraction form
    860,144.84/1,187,040.39 = 478,178/x
  3. Step 3: Cross multiply
    860,144.84x = 1,187,040.39 × 478,178
  4. Step 4: Simplify right side
    860,144.84x = 567,616,599,609.42
  5. Step 5: Solve for x
    x = 567,616,599,609.42/860,144.84
  6. Step 6: Final answer
    x = 659,908.16

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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.