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Finding the Fourth Proportional to 710,638.49, 980,683.67 and 388,348.61

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Solution

The fourth proportional to 710,638.49, 980,683.67 and 388,348.61 is: 535,922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,638.49 : 980,683.67 = 388,348.61 : x
  2. Step 2: Convert to fraction form
    710,638.49/980,683.67 = 388,348.61/x
  3. Step 3: Cross multiply
    710,638.49x = 980,683.67 × 388,348.61
  4. Step 4: Simplify right side
    710,638.49x = 380,847,136,161.65
  5. Step 5: Solve for x
    x = 380,847,136,161.65/710,638.49
  6. Step 6: Final answer
    x = 535,922.47

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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.