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Finding the Fourth Proportional to 425,419.10, 638,128.65 and 236,462.30

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Solution

The fourth proportional to 425,419.10, 638,128.65 and 236,462.30 is: 354,693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,419.10 : 638,128.65 = 236,462.30 : x
  2. Step 2: Convert to fraction form
    425,419.10/638,128.65 = 236,462.30/x
  3. Step 3: Cross multiply
    425,419.10x = 638,128.65 × 236,462.30
  4. Step 4: Simplify right side
    425,419.10x = 150,893,368,274.90
  5. Step 5: Solve for x
    x = 150,893,368,274.90/425,419.10
  6. Step 6: Final answer
    x = 354,693.45

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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.