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Finding the Fourth Proportional to 860,430.42, 1,187,394.98 and 478,449

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Solution

The fourth proportional to 860,430.42, 1,187,394.98 and 478,449 is: 660,260.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,430.42 : 1,187,394.98 = 478,449 : x
  2. Step 2: Convert to fraction form
    860,430.42/1,187,394.98 = 478,449/x
  3. Step 3: Cross multiply
    860,430.42x = 1,187,394.98 × 478,449
  4. Step 4: Simplify right side
    860,430.42x = 568,107,940,786.02
  5. Step 5: Solve for x
    x = 568,107,940,786.02/860,430.42
  6. Step 6: Final answer
    x = 660,260.18

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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.