Home / 742,620.45-1,113,814.50-287,147.63

Finding the Fourth Proportional to 742,620.45, 1,113,814.50 and 287,147.63

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Solution

The fourth proportional to 742,620.45, 1,113,814.50 and 287,147.63 is: 430,676.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,620.45 : 1,113,814.50 = 287,147.63 : x
  2. Step 2: Convert to fraction form
    742,620.45/1,113,814.50 = 287,147.63/x
  3. Step 3: Cross multiply
    742,620.45x = 1,113,814.50 × 287,147.63
  4. Step 4: Simplify right side
    742,620.45x = 319,829,195,642.37
  5. Step 5: Solve for x
    x = 319,829,195,642.37/742,620.45
  6. Step 6: Final answer
    x = 430,676.52

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1.5x scale

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.