Home / 687,119.25-947,830.62-428,547.29

Finding the Fourth Proportional to 687,119.25, 947,830.62 and 428,547.29

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Solution

The fourth proportional to 687,119.25, 947,830.62 and 428,547.29 is: 591,149.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,119.25 : 947,830.62 = 428,547.29 : x
  2. Step 2: Convert to fraction form
    687,119.25/947,830.62 = 428,547.29/x
  3. Step 3: Cross multiply
    687,119.25x = 947,830.62 × 428,547.29
  4. Step 4: Simplify right side
    687,119.25x = 406,190,238,840.87
  5. Step 5: Solve for x
    x = 406,190,238,840.87/687,119.25
  6. Step 6: Final answer
    x = 591,149.55

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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.