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Finding the Fourth Proportional to 990,674,478.01, 1,482,778,144.57 and 728,289,569.91

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Solution

The fourth proportional to 990,674,478.01, 1,482,778,144.57 and 728,289,569.91 is: 1,090,057,209.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,674,478.01 : 1,482,778,144.57 = 728,289,569.91 : x
  2. Step 2: Convert to fraction form
    990,674,478.01/1,482,778,144.57 = 728,289,569.91/x
  3. Step 3: Cross multiply
    990,674,478.01x = 1,482,778,144.57 × 728,289,569.91
  4. Step 4: Simplify right side
    990,674,478.01x = 1,079,891,857,177,638,144
  5. Step 5: Solve for x
    x = 1,079,891,857,177,638,144/990,674,478.01
  6. Step 6: Final answer
    x = 1,090,057,209.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.