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Finding the Fourth Proportional to 692,640.75, 955,834.93 and 386,721.82

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Solution

The fourth proportional to 692,640.75, 955,834.93 and 386,721.82 is: 533,670.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,640.75 : 955,834.93 = 386,721.82 : x
  2. Step 2: Convert to fraction form
    692,640.75/955,834.93 = 386,721.82/x
  3. Step 3: Cross multiply
    692,640.75x = 955,834.93 × 386,721.82
  4. Step 4: Simplify right side
    692,640.75x = 369,642,223,749.17
  5. Step 5: Solve for x
    x = 369,642,223,749.17/692,640.75
  6. Step 6: Final answer
    x = 533,670.92

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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.