Home / 685,167,751.38-945,507,032.53-387,803,609.05

Finding the Fourth Proportional to 685,167,751.38, 945,507,032.53 and 387,803,609.05

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Solution

The fourth proportional to 685,167,751.38, 945,507,032.53 and 387,803,609.05 is: 535,155,133.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,167,751.38 : 945,507,032.53 = 387,803,609.05 : x
  2. Step 2: Convert to fraction form
    685,167,751.38/945,507,032.53 = 387,803,609.05/x
  3. Step 3: Cross multiply
    685,167,751.38x = 945,507,032.53 × 387,803,609.05
  4. Step 4: Simplify right side
    685,167,751.38x = 366,671,039,598,400,384
  5. Step 5: Solve for x
    x = 366,671,039,598,400,384/685,167,751.38
  6. Step 6: Final answer
    x = 535,155,133.70

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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.