Home / 870,017,205.69-1,200,649,728.96-535,682,608.47

Finding the Fourth Proportional to 870,017,205.69, 1,200,649,728.96 and 535,682,608.47

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Solution

The fourth proportional to 870,017,205.69, 1,200,649,728.96 and 535,682,608.47 is: 739,257,999.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,017,205.69 : 1,200,649,728.96 = 535,682,608.47 : x
  2. Step 2: Convert to fraction form
    870,017,205.69/1,200,649,728.96 = 535,682,608.47/x
  3. Step 3: Cross multiply
    870,017,205.69x = 1,200,649,728.96 × 535,682,608.47
  4. Step 4: Simplify right side
    870,017,205.69x = 643,167,178,668,091,392
  5. Step 5: Solve for x
    x = 643,167,178,668,091,392/870,017,205.69
  6. Step 6: Final answer
    x = 739,257,999.11

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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.