Home / 620,423.81-856,084.48-387,823.53

Finding the Fourth Proportional to 620,423.81, 856,084.48 and 387,823.53

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Solution

The fourth proportional to 620,423.81, 856,084.48 and 387,823.53 is: 535,133.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,423.81 : 856,084.48 = 387,823.53 : x
  2. Step 2: Convert to fraction form
    620,423.81/856,084.48 = 387,823.53/x
  3. Step 3: Cross multiply
    620,423.81x = 856,084.48 × 387,823.53
  4. Step 4: Simplify right side
    620,423.81x = 332,009,704,042.26
  5. Step 5: Solve for x
    x = 332,009,704,042.26/620,423.81
  6. Step 6: Final answer
    x = 535,133.73

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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.