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Finding the Fourth Proportional to 638,446.25, 955,303.80 and 511,702.08

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Solution

The fourth proportional to 638,446.25, 955,303.80 and 511,702.08 is: 765,657.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,446.25 : 955,303.80 = 511,702.08 : x
  2. Step 2: Convert to fraction form
    638,446.25/955,303.80 = 511,702.08/x
  3. Step 3: Cross multiply
    638,446.25x = 955,303.80 × 511,702.08
  4. Step 4: Simplify right side
    638,446.25x = 488,830,941,491.90
  5. Step 5: Solve for x
    x = 488,830,941,491.90/638,446.25
  6. Step 6: Final answer
    x = 765,657.16

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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.