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Finding the Fourth Proportional to 486,683.42, 671,955.18 and 315,016.88

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Solution

The fourth proportional to 486,683.42, 671,955.18 and 315,016.88 is: 434,938.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,683.42 : 671,955.18 = 315,016.88 : x
  2. Step 2: Convert to fraction form
    486,683.42/671,955.18 = 315,016.88/x
  3. Step 3: Cross multiply
    486,683.42x = 671,955.18 × 315,016.88
  4. Step 4: Simplify right side
    486,683.42x = 211,677,224,303.44
  5. Step 5: Solve for x
    x = 211,677,224,303.44/486,683.42
  6. Step 6: Final answer
    x = 434,938.23

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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.