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Finding the Fourth Proportional to 1,392,450,210.72, 1,921,722,234.12 and 797,813,570.16

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Solution

The fourth proportional to 1,392,450,210.72, 1,921,722,234.12 and 797,813,570.16 is: 1,101,063,481.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,450,210.72 : 1,921,722,234.12 = 797,813,570.16 : x
  2. Step 2: Convert to fraction form
    1,392,450,210.72/1,921,722,234.12 = 797,813,570.16/x
  3. Step 3: Cross multiply
    1,392,450,210.72x = 1,921,722,234.12 × 797,813,570.16
  4. Step 4: Simplify right side
    1,392,450,210.72x = 1,533,176,076,459,128,320
  5. Step 5: Solve for x
    x = 1,533,176,076,459,128,320/1,392,450,210.72
  6. Step 6: Final answer
    x = 1,101,063,481.23

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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.