Home / 390,734,706.74-539,229,059.10-214,530,128.78

Finding the Fourth Proportional to 390,734,706.74, 539,229,059.10 and 214,530,128.78

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Solution

The fourth proportional to 390,734,706.74, 539,229,059.10 and 214,530,128.78 is: 296,059,903.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,734,706.74 : 539,229,059.10 = 214,530,128.78 : x
  2. Step 2: Convert to fraction form
    390,734,706.74/539,229,059.10 = 214,530,128.78/x
  3. Step 3: Cross multiply
    390,734,706.74x = 539,229,059.10 × 214,530,128.78
  4. Step 4: Simplify right side
    390,734,706.74x = 115,680,879,487,945,088
  5. Step 5: Solve for x
    x = 115,680,879,487,945,088/390,734,706.74
  6. Step 6: Final answer
    x = 296,059,903.29

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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.