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Finding the Fourth Proportional to 716,143.50, 988,302.87 and 393,877.98

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Solution

The fourth proportional to 716,143.50, 988,302.87 and 393,877.98 is: 543,565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,143.50 : 988,302.87 = 393,877.98 : x
  2. Step 2: Convert to fraction form
    716,143.50/988,302.87 = 393,877.98/x
  3. Step 3: Cross multiply
    716,143.50x = 988,302.87 × 393,877.98
  4. Step 4: Simplify right side
    716,143.50x = 389,270,738,063.80
  5. Step 5: Solve for x
    x = 389,270,738,063.80/716,143.50
  6. Step 6: Final answer
    x = 543,565.27

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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.