Home / 430,985.72-646,580.34-135,497.72

Finding the Fourth Proportional to 430,985.72, 646,580.34 and 135,497.72

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Solution

The fourth proportional to 430,985.72, 646,580.34 and 135,497.72 is: 203,278.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,985.72 : 646,580.34 = 135,497.72 : x
  2. Step 2: Convert to fraction form
    430,985.72/646,580.34 = 135,497.72/x
  3. Step 3: Cross multiply
    430,985.72x = 646,580.34 × 135,497.72
  4. Step 4: Simplify right side
    430,985.72x = 87,610,161,866.82
  5. Step 5: Solve for x
    x = 87,610,161,866.82/430,985.72
  6. Step 6: Final answer
    x = 203,278.57

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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.