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Finding the Fourth Proportional to 553,404.20, 830,106.30 and 488,085.80

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Solution

The fourth proportional to 553,404.20, 830,106.30 and 488,085.80 is: 732,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,404.20 : 830,106.30 = 488,085.80 : x
  2. Step 2: Convert to fraction form
    553,404.20/830,106.30 = 488,085.80/x
  3. Step 3: Cross multiply
    553,404.20x = 830,106.30 × 488,085.80
  4. Step 4: Simplify right side
    553,404.20x = 405,163,097,520.54
  5. Step 5: Solve for x
    x = 405,163,097,520.54/553,404.20
  6. Step 6: Final answer
    x = 732,128.70

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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.