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Finding the Fourth Proportional to 554,128.32, 831,192.48 and 427,952.60

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Solution

The fourth proportional to 554,128.32, 831,192.48 and 427,952.60 is: 641,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,128.32 : 831,192.48 = 427,952.60 : x
  2. Step 2: Convert to fraction form
    554,128.32/831,192.48 = 427,952.60/x
  3. Step 3: Cross multiply
    554,128.32x = 831,192.48 × 427,952.60
  4. Step 4: Simplify right side
    554,128.32x = 355,710,978,760.49
  5. Step 5: Solve for x
    x = 355,710,978,760.49/554,128.32
  6. Step 6: Final answer
    x = 641,928.89

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.