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Finding the Fourth Proportional to 425,856.18, 638,784.54 and 238,998.90

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Solution

The fourth proportional to 425,856.18, 638,784.54 and 238,998.90 is: 358,498.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,856.18 : 638,784.54 = 238,998.90 : x
  2. Step 2: Convert to fraction form
    425,856.18/638,784.54 = 238,998.90/x
  3. Step 3: Cross multiply
    425,856.18x = 638,784.54 × 238,998.90
  4. Step 4: Simplify right side
    425,856.18x = 152,668,802,397.01
  5. Step 5: Solve for x
    x = 152,668,802,397.01/425,856.18
  6. Step 6: Final answer
    x = 358,498.50

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Double scale
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Similar ratio
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1.5x scale

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.