Home / 1,137,966.21-1,707,203.55-428,000.40

Finding the Fourth Proportional to 1,137,966.21, 1,707,203.55 and 428,000.40

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Solution

The fourth proportional to 1,137,966.21, 1,707,203.55 and 428,000.40 is: 642,096.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137,966.21 : 1,707,203.55 = 428,000.40 : x
  2. Step 2: Convert to fraction form
    1,137,966.21/1,707,203.55 = 428,000.40/x
  3. Step 3: Cross multiply
    1,137,966.21x = 1,707,203.55 × 428,000.40
  4. Step 4: Simplify right side
    1,137,966.21x = 730,683,802,281.42
  5. Step 5: Solve for x
    x = 730,683,802,281.42/1,137,966.21
  6. Step 6: Final answer
    x = 642,096.22

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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.