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Finding the Fourth Proportional to 256,618.72, 384,731.86 and 155,394.74

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Solution

The fourth proportional to 256,618.72, 384,731.86 and 155,394.74 is: 232,973.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,618.72 : 384,731.86 = 155,394.74 : x
  2. Step 2: Convert to fraction form
    256,618.72/384,731.86 = 155,394.74/x
  3. Step 3: Cross multiply
    256,618.72x = 384,731.86 × 155,394.74
  4. Step 4: Simplify right side
    256,618.72x = 59,785,307,354.42
  5. Step 5: Solve for x
    x = 59,785,307,354.42/256,618.72
  6. Step 6: Final answer
    x = 232,973.29

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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.