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Finding the Fourth Proportional to 489,941.67, 734,223.30 and 389,656.79

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Solution

The fourth proportional to 489,941.67, 734,223.30 and 389,656.79 is: 583,937.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,941.67 : 734,223.30 = 389,656.79 : x
  2. Step 2: Convert to fraction form
    489,941.67/734,223.30 = 389,656.79/x
  3. Step 3: Cross multiply
    489,941.67x = 734,223.30 × 389,656.79
  4. Step 4: Simplify right side
    489,941.67x = 286,095,094,221.21
  5. Step 5: Solve for x
    x = 286,095,094,221.21/489,941.67
  6. Step 6: Final answer
    x = 583,937.05

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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.