Home / 428,569.04-642,960.56-302,455.44

Finding the Fourth Proportional to 428,569.04, 642,960.56 and 302,455.44

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Solution

The fourth proportional to 428,569.04, 642,960.56 and 302,455.44 is: 453,758.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,569.04 : 642,960.56 = 302,455.44 : x
  2. Step 2: Convert to fraction form
    428,569.04/642,960.56 = 302,455.44/x
  3. Step 3: Cross multiply
    428,569.04x = 642,960.56 × 302,455.44
  4. Step 4: Simplify right side
    428,569.04x = 194,466,919,077.45
  5. Step 5: Solve for x
    x = 194,466,919,077.45/428,569.04
  6. Step 6: Final answer
    x = 453,758.67

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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.