Home / 860,436.78-1,187,387.82-478,455.36

Finding the Fourth Proportional to 860,436.78, 1,187,387.82 and 478,455.36

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Solution

The fourth proportional to 860,436.78, 1,187,387.82 and 478,455.36 is: 660,260.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,436.78 : 1,187,387.82 = 478,455.36 : x
  2. Step 2: Convert to fraction form
    860,436.78/1,187,387.82 = 478,455.36/x
  3. Step 3: Cross multiply
    860,436.78x = 1,187,387.82 × 478,455.36
  4. Step 4: Simplify right side
    860,436.78x = 568,112,066,877.72
  5. Step 5: Solve for x
    x = 568,112,066,877.72/860,436.78
  6. Step 6: Final answer
    x = 660,260.09

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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.