Home / 430,428.80-645,758.40-384,003.20

Finding the Fourth Proportional to 430,428.80, 645,758.40 and 384,003.20

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Solution

The fourth proportional to 430,428.80, 645,758.40 and 384,003.20 is: 576,107.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,428.80 : 645,758.40 = 384,003.20 : x
  2. Step 2: Convert to fraction form
    430,428.80/645,758.40 = 384,003.20/x
  3. Step 3: Cross multiply
    430,428.80x = 645,758.40 × 384,003.20
  4. Step 4: Simplify right side
    430,428.80x = 247,973,292,026.88
  5. Step 5: Solve for x
    x = 247,973,292,026.88/430,428.80
  6. Step 6: Final answer
    x = 576,107.57

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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.