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Finding the Fourth Proportional to 565,525.80, 780,405.86 and 310,875.16

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Solution

The fourth proportional to 565,525.80, 780,405.86 and 310,875.16 is: 428,996.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,525.80 : 780,405.86 = 310,875.16 : x
  2. Step 2: Convert to fraction form
    565,525.80/780,405.86 = 310,875.16/x
  3. Step 3: Cross multiply
    565,525.80x = 780,405.86 × 310,875.16
  4. Step 4: Simplify right side
    565,525.80x = 242,608,796,592.44
  5. Step 5: Solve for x
    x = 242,608,796,592.44/565,525.80
  6. Step 6: Final answer
    x = 428,996.87

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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.