Home / 658,945.18-909,097.59-387,021.70

Finding the Fourth Proportional to 658,945.18, 909,097.59 and 387,021.70

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Solution

The fourth proportional to 658,945.18, 909,097.59 and 387,021.70 is: 533,945.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,945.18 : 909,097.59 = 387,021.70 : x
  2. Step 2: Convert to fraction form
    658,945.18/909,097.59 = 387,021.70/x
  3. Step 3: Cross multiply
    658,945.18x = 909,097.59 × 387,021.70
  4. Step 4: Simplify right side
    658,945.18x = 351,840,494,747.70
  5. Step 5: Solve for x
    x = 351,840,494,747.70/658,945.18
  6. Step 6: Final answer
    x = 533,945.02

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1.5x scale

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.