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Finding the Fourth Proportional to 554,458.80, 765,068.28 and 312,730.80

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Solution

The fourth proportional to 554,458.80, 765,068.28 and 312,730.80 is: 431,520.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,458.80 : 765,068.28 = 312,730.80 : x
  2. Step 2: Convert to fraction form
    554,458.80/765,068.28 = 312,730.80/x
  3. Step 3: Cross multiply
    554,458.80x = 765,068.28 × 312,730.80
  4. Step 4: Simplify right side
    554,458.80x = 239,260,415,259.02
  5. Step 5: Solve for x
    x = 239,260,415,259.02/554,458.80
  6. Step 6: Final answer
    x = 431,520.64

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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.