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Finding the Fourth Proportional to 554,430.25, 765,069.73 and 312,635.53

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Solution

The fourth proportional to 554,430.25, 765,069.73 and 312,635.53 is: 431,412.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,430.25 : 765,069.73 = 312,635.53 : x
  2. Step 2: Convert to fraction form
    554,430.25/765,069.73 = 312,635.53/x
  3. Step 3: Cross multiply
    554,430.25x = 765,069.73 × 312,635.53
  4. Step 4: Simplify right side
    554,430.25x = 239,187,980,525.51
  5. Step 5: Solve for x
    x = 239,187,980,525.51/554,430.25
  6. Step 6: Final answer
    x = 431,412.21

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1.5x scale

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.