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Finding the Fourth Proportional to 405,963.90, 607,779.45 and 248,499.90

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Solution

The fourth proportional to 405,963.90, 607,779.45 and 248,499.90 is: 372,035.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,963.90 : 607,779.45 = 248,499.90 : x
  2. Step 2: Convert to fraction form
    405,963.90/607,779.45 = 248,499.90/x
  3. Step 3: Cross multiply
    405,963.90x = 607,779.45 × 248,499.90
  4. Step 4: Simplify right side
    405,963.90x = 151,033,132,547.06
  5. Step 5: Solve for x
    x = 151,033,132,547.06/405,963.90
  6. Step 6: Final answer
    x = 372,035.87

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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.