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Finding the Fourth Proportional to 705,409.89, 973,472.78 and 383,126.28

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Solution

The fourth proportional to 705,409.89, 973,472.78 and 383,126.28 is: 528,718.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,409.89 : 973,472.78 = 383,126.28 : x
  2. Step 2: Convert to fraction form
    705,409.89/973,472.78 = 383,126.28/x
  3. Step 3: Cross multiply
    705,409.89x = 973,472.78 × 383,126.28
  4. Step 4: Simplify right side
    705,409.89x = 372,963,005,840.47
  5. Step 5: Solve for x
    x = 372,963,005,840.47/705,409.89
  6. Step 6: Final answer
    x = 528,718.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.