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Finding the Fourth Proportional to 385,621.89, 577,679.54 and 265,657.65

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Solution

The fourth proportional to 385,621.89, 577,679.54 and 265,657.65 is: 397,967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,621.89 : 577,679.54 = 265,657.65 : x
  2. Step 2: Convert to fraction form
    385,621.89/577,679.54 = 265,657.65/x
  3. Step 3: Cross multiply
    385,621.89x = 577,679.54 × 265,657.65
  4. Step 4: Simplify right side
    385,621.89x = 153,464,987,721.19
  5. Step 5: Solve for x
    x = 153,464,987,721.19/385,621.89
  6. Step 6: Final answer
    x = 397,967.52

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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.