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Finding the Fourth Proportional to 860,345.08, 1,187,571.56 and 520,813.44

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Solution

The fourth proportional to 860,345.08, 1,187,571.56 and 520,813.44 is: 718,901.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,345.08 : 1,187,571.56 = 520,813.44 : x
  2. Step 2: Convert to fraction form
    860,345.08/1,187,571.56 = 520,813.44/x
  3. Step 3: Cross multiply
    860,345.08x = 1,187,571.56 × 520,813.44
  4. Step 4: Simplify right side
    860,345.08x = 618,503,229,409.77
  5. Step 5: Solve for x
    x = 618,503,229,409.77/860,345.08
  6. Step 6: Final answer
    x = 718,901.34

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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.