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Finding the Fourth Proportional to 720,981,036.45, 1,081,471,554.68 and 720,981,036.45

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Solution

The fourth proportional to 720,981,036.45, 1,081,471,554.68 and 720,981,036.45 is: 1,081,471,554.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,981,036.45 : 1,081,471,554.68 = 720,981,036.45 : x
  2. Step 2: Convert to fraction form
    720,981,036.45/1,081,471,554.68 = 720,981,036.45/x
  3. Step 3: Cross multiply
    720,981,036.45x = 1,081,471,554.68 × 720,981,036.45
  4. Step 4: Simplify right side
    720,981,036.45x = 779,720,482,380,774,400
  5. Step 5: Solve for x
    x = 779,720,482,380,774,400/720,981,036.45
  6. Step 6: Final answer
    x = 1,081,471,554.68

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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.