Home / 687,119.13-947,830.44-428,547.16

Finding the Fourth Proportional to 687,119.13, 947,830.44 and 428,547.16

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Solution

The fourth proportional to 687,119.13, 947,830.44 and 428,547.16 is: 591,149.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,119.13 : 947,830.44 = 428,547.16 : x
  2. Step 2: Convert to fraction form
    687,119.13/947,830.44 = 428,547.16/x
  3. Step 3: Cross multiply
    687,119.13x = 947,830.44 × 428,547.16
  4. Step 4: Simplify right side
    687,119.13x = 406,190,043,604.81
  5. Step 5: Solve for x
    x = 406,190,043,604.81/687,119.13
  6. Step 6: Final answer
    x = 591,149.37

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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.