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Finding the Fourth Proportional to 2,672,938.40, 4,009,407.60 and 989,823.20

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Solution

The fourth proportional to 2,672,938.40, 4,009,407.60 and 989,823.20 is: 1,484,734.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672,938.40 : 4,009,407.60 = 989,823.20 : x
  2. Step 2: Convert to fraction form
    2,672,938.40/4,009,407.60 = 989,823.20/x
  3. Step 3: Cross multiply
    2,672,938.40x = 4,009,407.60 × 989,823.20
  4. Step 4: Simplify right side
    2,672,938.40x = 3,968,604,660,736.32
  5. Step 5: Solve for x
    x = 3,968,604,660,736.32/2,672,938.40
  6. Step 6: Final answer
    x = 1,484,734.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.