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Finding the Fourth Proportional to 720,059.28, 993,640.73 and 429,998.28

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Solution

The fourth proportional to 720,059.28, 993,640.73 and 429,998.28 is: 593,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,059.28 : 993,640.73 = 429,998.28 : x
  2. Step 2: Convert to fraction form
    720,059.28/993,640.73 = 429,998.28/x
  3. Step 3: Cross multiply
    720,059.28x = 993,640.73 × 429,998.28
  4. Step 4: Simplify right side
    720,059.28x = 427,263,804,837.94
  5. Step 5: Solve for x
    x = 427,263,804,837.94/720,059.28
  6. Step 6: Final answer
    x = 593,373.10

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Double scale
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Similar ratio
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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.