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Finding the Fourth Proportional to 858,678,614.90, 1,288,017,922.35 and 858,678,614.90

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Solution

The fourth proportional to 858,678,614.90, 1,288,017,922.35 and 858,678,614.90 is: 1,288,017,922.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,678,614.90 : 1,288,017,922.35 = 858,678,614.90 : x
  2. Step 2: Convert to fraction form
    858,678,614.90/1,288,017,922.35 = 858,678,614.90/x
  3. Step 3: Cross multiply
    858,678,614.90x = 1,288,017,922.35 × 858,678,614.90
  4. Step 4: Simplify right side
    858,678,614.90x = 1,105,993,445,529,873,664
  5. Step 5: Solve for x
    x = 1,105,993,445,529,873,664/858,678,614.90
  6. Step 6: Final answer
    x = 1,288,017,922.35

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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.