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Finding the Fourth Proportional to 455,678.40, 624,269.04 and 438,640.80

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Solution

The fourth proportional to 455,678.40, 624,269.04 and 438,640.80 is: 600,927.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,678.40 : 624,269.04 = 438,640.80 : x
  2. Step 2: Convert to fraction form
    455,678.40/624,269.04 = 438,640.80/x
  3. Step 3: Cross multiply
    455,678.40x = 624,269.04 × 438,640.80
  4. Step 4: Simplify right side
    455,678.40x = 273,829,871,120.83
  5. Step 5: Solve for x
    x = 273,829,871,120.83/455,678.40
  6. Step 6: Final answer
    x = 600,927.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.