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Finding the Fourth Proportional to 1,274,581, 1,911,871.50 and 388,117

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Solution

The fourth proportional to 1,274,581, 1,911,871.50 and 388,117 is: 582,175.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274,581 : 1,911,871.50 = 388,117 : x
  2. Step 2: Convert to fraction form
    1,274,581/1,911,871.50 = 388,117/x
  3. Step 3: Cross multiply
    1,274,581x = 1,911,871.50 × 388,117
  4. Step 4: Simplify right side
    1,274,581x = 742,029,830,965.50
  5. Step 5: Solve for x
    x = 742,029,830,965.50/1,274,581
  6. Step 6: Final answer
    x = 582,175.50

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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.