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Finding the Fourth Proportional to 1,212,569,718.73, 1,673,368,005.26 and 711,140,157.01

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Solution

The fourth proportional to 1,212,569,718.73, 1,673,368,005.26 and 711,140,157.01 is: 981,386,197.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,569,718.73 : 1,673,368,005.26 = 711,140,157.01 : x
  2. Step 2: Convert to fraction form
    1,212,569,718.73/1,673,368,005.26 = 711,140,157.01/x
  3. Step 3: Cross multiply
    1,212,569,718.73x = 1,673,368,005.26 × 711,140,157.01
  4. Step 4: Simplify right side
    1,212,569,718.73x = 1,189,999,185,999,976,448
  5. Step 5: Solve for x
    x = 1,189,999,185,999,976,448/1,212,569,718.73
  6. Step 6: Final answer
    x = 981,386,197.94

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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.