Home / 386,333.28-579,411.36-105,872.40

Finding the Fourth Proportional to 386,333.28, 579,411.36 and 105,872.40

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Solution

The fourth proportional to 386,333.28, 579,411.36 and 105,872.40 is: 158,784.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,333.28 : 579,411.36 = 105,872.40 : x
  2. Step 2: Convert to fraction form
    386,333.28/579,411.36 = 105,872.40/x
  3. Step 3: Cross multiply
    386,333.28x = 579,411.36 × 105,872.40
  4. Step 4: Simplify right side
    386,333.28x = 61,343,671,270.46
  5. Step 5: Solve for x
    x = 61,343,671,270.46/386,333.28
  6. Step 6: Final answer
    x = 158,784.33

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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.