Home / 256,411.32-384,663.45-128,394.36

Finding the Fourth Proportional to 256,411.32, 384,663.45 and 128,394.36

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Solution

The fourth proportional to 256,411.32, 384,663.45 and 128,394.36 is: 192,614.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,411.32 : 384,663.45 = 128,394.36 : x
  2. Step 2: Convert to fraction form
    256,411.32/384,663.45 = 128,394.36/x
  3. Step 3: Cross multiply
    256,411.32x = 384,663.45 × 128,394.36
  4. Step 4: Simplify right side
    256,411.32x = 49,388,617,478.14
  5. Step 5: Solve for x
    x = 49,388,617,478.14/256,411.32
  6. Step 6: Final answer
    x = 192,614.81

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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.