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Finding the Fourth Proportional to 386,594.21, 579,974.74 and 116,700

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Solution

The fourth proportional to 386,594.21, 579,974.74 and 116,700 is: 175,075.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,594.21 : 579,974.74 = 116,700 : x
  2. Step 2: Convert to fraction form
    386,594.21/579,974.74 = 116,700/x
  3. Step 3: Cross multiply
    386,594.21x = 579,974.74 × 116,700
  4. Step 4: Simplify right side
    386,594.21x = 67,683,051,574.50
  5. Step 5: Solve for x
    x = 67,683,051,574.50/386,594.21
  6. Step 6: Final answer
    x = 175,075.18

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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.