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Finding the Fourth Proportional to 716,172.44, 988,318.32 and 393,904.40

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Solution

The fourth proportional to 716,172.44, 988,318.32 and 393,904.40 is: 543,588.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,172.44 : 988,318.32 = 393,904.40 : x
  2. Step 2: Convert to fraction form
    716,172.44/988,318.32 = 393,904.40/x
  3. Step 3: Cross multiply
    716,172.44x = 988,318.32 × 393,904.40
  4. Step 4: Simplify right side
    716,172.44x = 389,302,934,848.61
  5. Step 5: Solve for x
    x = 389,302,934,848.61/716,172.44
  6. Step 6: Final answer
    x = 543,588.27

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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.