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Finding the Fourth Proportional to 716,120.42, 988,226.45 and 393,830.48

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Solution

The fourth proportional to 716,120.42, 988,226.45 and 393,830.48 is: 543,475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,120.42 : 988,226.45 = 393,830.48 : x
  2. Step 2: Convert to fraction form
    716,120.42/988,226.45 = 393,830.48/x
  3. Step 3: Cross multiply
    716,120.42x = 988,226.45 × 393,830.48
  4. Step 4: Simplify right side
    716,120.42x = 389,193,700,607.34
  5. Step 5: Solve for x
    x = 389,193,700,607.34/716,120.42
  6. Step 6: Final answer
    x = 543,475.22

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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.