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Finding the Fourth Proportional to 425,856.30, 638,784.45 and 349,748.70

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Solution

The fourth proportional to 425,856.30, 638,784.45 and 349,748.70 is: 524,623.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,856.30 : 638,784.45 = 349,748.70 : x
  2. Step 2: Convert to fraction form
    425,856.30/638,784.45 = 349,748.70/x
  3. Step 3: Cross multiply
    425,856.30x = 638,784.45 × 349,748.70
  4. Step 4: Simplify right side
    425,856.30x = 223,414,030,967.72
  5. Step 5: Solve for x
    x = 223,414,030,967.72/425,856.30
  6. Step 6: Final answer
    x = 524,623.05

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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.