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Finding the Fourth Proportional to 565,622.72, 780,539.28 and 310,971.92

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Solution

The fourth proportional to 565,622.72, 780,539.28 and 310,971.92 is: 429,130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,622.72 : 780,539.28 = 310,971.92 : x
  2. Step 2: Convert to fraction form
    565,622.72/780,539.28 = 310,971.92/x
  3. Step 3: Cross multiply
    565,622.72x = 780,539.28 × 310,971.92
  4. Step 4: Simplify right side
    565,622.72x = 242,725,798,537.02
  5. Step 5: Solve for x
    x = 242,725,798,537.02/565,622.72
  6. Step 6: Final answer
    x = 429,130.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.