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Finding the Fourth Proportional to 565,505.15, 780,377.33 and 310,854.51

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Solution

The fourth proportional to 565,505.15, 780,377.33 and 310,854.51 is: 428,968.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,505.15 : 780,377.33 = 310,854.51 : x
  2. Step 2: Convert to fraction form
    565,505.15/780,377.33 = 310,854.51/x
  3. Step 3: Cross multiply
    565,505.15x = 780,377.33 × 310,854.51
  4. Step 4: Simplify right side
    565,505.15x = 242,583,816,235.81
  5. Step 5: Solve for x
    x = 242,583,816,235.81/565,505.15
  6. Step 6: Final answer
    x = 428,968.36

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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.