Home / 876,278.40-1,208,980.80-489,030.90

Finding the Fourth Proportional to 876,278.40, 1,208,980.80 and 489,030.90

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Solution

The fourth proportional to 876,278.40, 1,208,980.80 and 489,030.90 is: 674,704.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,278.40 : 1,208,980.80 = 489,030.90 : x
  2. Step 2: Convert to fraction form
    876,278.40/1,208,980.80 = 489,030.90/x
  3. Step 3: Cross multiply
    876,278.40x = 1,208,980.80 × 489,030.90
  4. Step 4: Simplify right side
    876,278.40x = 591,228,968,706.72
  5. Step 5: Solve for x
    x = 591,228,968,706.72/876,278.40
  6. Step 6: Final answer
    x = 674,704.49

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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.