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Finding the Fourth Proportional to 612,720.68, 919,087.54 and 186,325.85

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Solution

The fourth proportional to 612,720.68, 919,087.54 and 186,325.85 is: 279,490.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,720.68 : 919,087.54 = 186,325.85 : x
  2. Step 2: Convert to fraction form
    612,720.68/919,087.54 = 186,325.85/x
  3. Step 3: Cross multiply
    612,720.68x = 919,087.54 × 186,325.85
  4. Step 4: Simplify right side
    612,720.68x = 171,249,768,946.81
  5. Step 5: Solve for x
    x = 171,249,768,946.81/612,720.68
  6. Step 6: Final answer
    x = 279,490.76

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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.