Home / 687,118.50-947,829.58-428,546.54

Finding the Fourth Proportional to 687,118.50, 947,829.58 and 428,546.54

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Solution

The fourth proportional to 687,118.50, 947,829.58 and 428,546.54 is: 591,148.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,118.50 : 947,829.58 = 428,546.54 : x
  2. Step 2: Convert to fraction form
    687,118.50/947,829.58 = 428,546.54/x
  3. Step 3: Cross multiply
    687,118.50x = 947,829.58 × 428,546.54
  4. Step 4: Simplify right side
    687,118.50x = 406,189,084,875.92
  5. Step 5: Solve for x
    x = 406,189,084,875.92/687,118.50
  6. Step 6: Final answer
    x = 591,148.52

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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.