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Finding the Fourth Proportional to 685,090.65, 960,701.55 and 685,090.65

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Solution

The fourth proportional to 685,090.65, 960,701.55 and 685,090.65 is: 960,701.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,090.65 : 960,701.55 = 685,090.65 : x
  2. Step 2: Convert to fraction form
    685,090.65/960,701.55 = 685,090.65/x
  3. Step 3: Cross multiply
    685,090.65x = 960,701.55 × 685,090.65
  4. Step 4: Simplify right side
    685,090.65x = 658,167,649,345.51
  5. Step 5: Solve for x
    x = 658,167,649,345.51/685,090.65
  6. Step 6: Final answer
    x = 960,701.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.