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Finding the Fourth Proportional to 554,430.08, 765,109.80 and 312,714.66

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Solution

The fourth proportional to 554,430.08, 765,109.80 and 312,714.66 is: 431,544.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,430.08 : 765,109.80 = 312,714.66 : x
  2. Step 2: Convert to fraction form
    554,430.08/765,109.80 = 312,714.66/x
  3. Step 3: Cross multiply
    554,430.08x = 765,109.80 × 312,714.66
  4. Step 4: Simplify right side
    554,430.08x = 239,261,050,969.67
  5. Step 5: Solve for x
    x = 239,261,050,969.67/554,430.08
  6. Step 6: Final answer
    x = 431,544.14

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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.