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Finding the Fourth Proportional to 876,647.72, 1,209,762.02 and 489,469.10

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Solution

The fourth proportional to 876,647.72, 1,209,762.02 and 489,469.10 is: 675,460.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,647.72 : 1,209,762.02 = 489,469.10 : x
  2. Step 2: Convert to fraction form
    876,647.72/1,209,762.02 = 489,469.10/x
  3. Step 3: Cross multiply
    876,647.72x = 1,209,762.02 × 489,469.10
  4. Step 4: Simplify right side
    876,647.72x = 592,141,127,143.58
  5. Step 5: Solve for x
    x = 592,141,127,143.58/876,647.72
  6. Step 6: Final answer
    x = 675,460.75

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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.