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Finding the Fourth Proportional to 876,649.02, 1,209,763.81 and 489,470.40

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Solution

The fourth proportional to 876,649.02, 1,209,763.81 and 489,470.40 is: 675,462.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,649.02 : 1,209,763.81 = 489,470.40 : x
  2. Step 2: Convert to fraction form
    876,649.02/1,209,763.81 = 489,470.40/x
  3. Step 3: Cross multiply
    876,649.02x = 1,209,763.81 × 489,470.40
  4. Step 4: Simplify right side
    876,649.02x = 592,143,575,986.22
  5. Step 5: Solve for x
    x = 592,143,575,986.22/876,649.02
  6. Step 6: Final answer
    x = 675,462.55

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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.