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Finding the Fourth Proportional to 697,139.60, 961,960.48 and 391,204.24

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Solution

The fourth proportional to 697,139.60, 961,960.48 and 391,204.24 is: 539,810.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,139.60 : 961,960.48 = 391,204.24 : x
  2. Step 2: Convert to fraction form
    697,139.60/961,960.48 = 391,204.24/x
  3. Step 3: Cross multiply
    697,139.60x = 961,960.48 × 391,204.24
  4. Step 4: Simplify right side
    697,139.60x = 376,323,018,488.44
  5. Step 5: Solve for x
    x = 376,323,018,488.44/697,139.60
  6. Step 6: Final answer
    x = 539,810.13

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Double scale
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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.