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Finding the Fourth Proportional to 389,586.66, 584,321.54 and 123,312.66

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Solution

The fourth proportional to 389,586.66, 584,321.54 and 123,312.66 is: 184,950.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,586.66 : 584,321.54 = 123,312.66 : x
  2. Step 2: Convert to fraction form
    389,586.66/584,321.54 = 123,312.66/x
  3. Step 3: Cross multiply
    389,586.66x = 584,321.54 × 123,312.66
  4. Step 4: Simplify right side
    389,586.66x = 72,054,242,776.13
  5. Step 5: Solve for x
    x = 72,054,242,776.13/389,586.66
  6. Step 6: Final answer
    x = 184,950.49

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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.