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Finding the Fourth Proportional to 430,393, 645,693.18 and 134,905

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Solution

The fourth proportional to 430,393, 645,693.18 and 134,905 is: 202,390.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,393 : 645,693.18 = 134,905 : x
  2. Step 2: Convert to fraction form
    430,393/645,693.18 = 134,905/x
  3. Step 3: Cross multiply
    430,393x = 645,693.18 × 134,905
  4. Step 4: Simplify right side
    430,393x = 87,107,238,447.90
  5. Step 5: Solve for x
    x = 87,107,238,447.90/430,393
  6. Step 6: Final answer
    x = 202,390.00

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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.