Home / 430,676.85-645,966.07-115,158.36

Finding the Fourth Proportional to 430,676.85, 645,966.07 and 115,158.36

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Solution

The fourth proportional to 430,676.85, 645,966.07 and 115,158.36 is: 172,724.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,676.85 : 645,966.07 = 115,158.36 : x
  2. Step 2: Convert to fraction form
    430,676.85/645,966.07 = 115,158.36/x
  3. Step 3: Cross multiply
    430,676.85x = 645,966.07 × 115,158.36
  4. Step 4: Simplify right side
    430,676.85x = 74,388,395,803.17
  5. Step 5: Solve for x
    x = 74,388,395,803.17/430,676.85
  6. Step 6: Final answer
    x = 172,724.39

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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.