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Finding the Fourth Proportional to 554,491.70, 831,737.55 and 440,330.30

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Solution

The fourth proportional to 554,491.70, 831,737.55 and 440,330.30 is: 660,495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,491.70 : 831,737.55 = 440,330.30 : x
  2. Step 2: Convert to fraction form
    554,491.70/831,737.55 = 440,330.30/x
  3. Step 3: Cross multiply
    554,491.70x = 831,737.55 × 440,330.30
  4. Step 4: Simplify right side
    554,491.70x = 366,239,244,912.77
  5. Step 5: Solve for x
    x = 366,239,244,912.77/554,491.70
  6. Step 6: Final answer
    x = 660,495.45

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Half scale
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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.