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Finding the Fourth Proportional to 860,620.38, 1,187,698.19 and 478,638.96

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Solution

The fourth proportional to 860,620.38, 1,187,698.19 and 478,638.96 is: 660,545.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,620.38 : 1,187,698.19 = 478,638.96 : x
  2. Step 2: Convert to fraction form
    860,620.38/1,187,698.19 = 478,638.96/x
  3. Step 3: Cross multiply
    860,620.38x = 1,187,698.19 × 478,638.96
  4. Step 4: Simplify right side
    860,620.38x = 568,478,624,062.29
  5. Step 5: Solve for x
    x = 568,478,624,062.29/860,620.38
  6. Step 6: Final answer
    x = 660,545.16

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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.