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Finding the Fourth Proportional to 612,136.80, 917,308.80 and 548,956.80

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Solution

The fourth proportional to 612,136.80, 917,308.80 and 548,956.80 is: 822,631.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,136.80 : 917,308.80 = 548,956.80 : x
  2. Step 2: Convert to fraction form
    612,136.80/917,308.80 = 548,956.80/x
  3. Step 3: Cross multiply
    612,136.80x = 917,308.80 × 548,956.80
  4. Step 4: Simplify right side
    612,136.80x = 503,562,903,459.84
  5. Step 5: Solve for x
    x = 503,562,903,459.84/612,136.80
  6. Step 6: Final answer
    x = 822,631.32

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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.