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Finding the Fourth Proportional to 455,477.60, 683,216.40 and 421,263.20

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Solution

The fourth proportional to 455,477.60, 683,216.40 and 421,263.20 is: 631,894.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,477.60 : 683,216.40 = 421,263.20 : x
  2. Step 2: Convert to fraction form
    455,477.60/683,216.40 = 421,263.20/x
  3. Step 3: Cross multiply
    455,477.60x = 683,216.40 × 421,263.20
  4. Step 4: Simplify right side
    455,477.60x = 287,813,926,956.48
  5. Step 5: Solve for x
    x = 287,813,926,956.48/455,477.60
  6. Step 6: Final answer
    x = 631,894.80

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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.