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Finding the Fourth Proportional to 476,699.26, 715,054.91 and 139,746.68

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Solution

The fourth proportional to 476,699.26, 715,054.91 and 139,746.68 is: 209,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,699.26 : 715,054.91 = 139,746.68 : x
  2. Step 2: Convert to fraction form
    476,699.26/715,054.91 = 139,746.68/x
  3. Step 3: Cross multiply
    476,699.26x = 715,054.91 × 139,746.68
  4. Step 4: Simplify right side
    476,699.26x = 99,926,549,690.20
  5. Step 5: Solve for x
    x = 99,926,549,690.20/476,699.26
  6. Step 6: Final answer
    x = 209,621.78

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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.