Home / 430,419.76-645,624.40-193,595.20

Finding the Fourth Proportional to 430,419.76, 645,624.40 and 193,595.20

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Solution

The fourth proportional to 430,419.76, 645,624.40 and 193,595.20 is: 290,390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,419.76 : 645,624.40 = 193,595.20 : x
  2. Step 2: Convert to fraction form
    430,419.76/645,624.40 = 193,595.20/x
  3. Step 3: Cross multiply
    430,419.76x = 645,624.40 × 193,595.20
  4. Step 4: Simplify right side
    430,419.76x = 124,989,784,842.88
  5. Step 5: Solve for x
    x = 124,989,784,842.88/430,419.76
  6. Step 6: Final answer
    x = 290,390.44

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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.