Home / 1,218,020,603.37-1,680,580,312.21-689,384,589.43

Finding the Fourth Proportional to 1,218,020,603.37, 1,680,580,312.21 and 689,384,589.43

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Solution

The fourth proportional to 1,218,020,603.37, 1,680,580,312.21 and 689,384,589.43 is: 951,187,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,020,603.37 : 1,680,580,312.21 = 689,384,589.43 : x
  2. Step 2: Convert to fraction form
    1,218,020,603.37/1,680,580,312.21 = 689,384,589.43/x
  3. Step 3: Cross multiply
    1,218,020,603.37x = 1,680,580,312.21 × 689,384,589.43
  4. Step 4: Simplify right side
    1,218,020,603.37x = 1,158,566,168,537,031,936
  5. Step 5: Solve for x
    x = 1,158,566,168,537,031,936/1,218,020,603.37
  6. Step 6: Final answer
    x = 951,187,660.81

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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.