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Finding the Fourth Proportional to 425,328.72, 638,091.84 and 144,848.40

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Solution

The fourth proportional to 425,328.72, 638,091.84 and 144,848.40 is: 217,306.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,328.72 : 638,091.84 = 144,848.40 : x
  2. Step 2: Convert to fraction form
    425,328.72/638,091.84 = 144,848.40/x
  3. Step 3: Cross multiply
    425,328.72x = 638,091.84 × 144,848.40
  4. Step 4: Simplify right side
    425,328.72x = 92,426,582,077.06
  5. Step 5: Solve for x
    x = 92,426,582,077.06/425,328.72
  6. Step 6: Final answer
    x = 217,306.23

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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.