Home / 678,557,638.40-1,017,836,457.60-628,673,043.20

Finding the Fourth Proportional to 678,557,638.40, 1,017,836,457.60 and 628,673,043.20

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Solution

The fourth proportional to 678,557,638.40, 1,017,836,457.60 and 628,673,043.20 is: 943,009,564.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,557,638.40 : 1,017,836,457.60 = 628,673,043.20 : x
  2. Step 2: Convert to fraction form
    678,557,638.40/1,017,836,457.60 = 628,673,043.20/x
  3. Step 3: Cross multiply
    678,557,638.40x = 1,017,836,457.60 × 628,673,043.20
  4. Step 4: Simplify right side
    678,557,638.40x = 639,886,343,279,299,840
  5. Step 5: Solve for x
    x = 639,886,343,279,299,840/678,557,638.40
  6. Step 6: Final answer
    x = 943,009,564.80

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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.