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Finding the Fourth Proportional to 308,606.70, 425,916.45 and 172,648.20

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Solution

The fourth proportional to 308,606.70, 425,916.45 and 172,648.20 is: 238,276.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,606.70 : 425,916.45 = 172,648.20 : x
  2. Step 2: Convert to fraction form
    308,606.70/425,916.45 = 172,648.20/x
  3. Step 3: Cross multiply
    308,606.70x = 425,916.45 × 172,648.20
  4. Step 4: Simplify right side
    308,606.70x = 73,533,708,442.89
  5. Step 5: Solve for x
    x = 73,533,708,442.89/308,606.70
  6. Step 6: Final answer
    x = 238,276.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.