Home / 430,885.85-645,723.75-340,531.31

Finding the Fourth Proportional to 430,885.85, 645,723.75 and 340,531.31

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Solution

The fourth proportional to 430,885.85, 645,723.75 and 340,531.31 is: 510,318.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,885.85 : 645,723.75 = 340,531.31 : x
  2. Step 2: Convert to fraction form
    430,885.85/645,723.75 = 340,531.31/x
  3. Step 3: Cross multiply
    430,885.85x = 645,723.75 × 340,531.31
  4. Step 4: Simplify right side
    430,885.85x = 219,889,151,829.23
  5. Step 5: Solve for x
    x = 219,889,151,829.23/430,885.85
  6. Step 6: Final answer
    x = 510,318.81

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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.