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Finding the Fourth Proportional to 554,008.15, 764,485.31 and 312,350.12

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Solution

The fourth proportional to 554,008.15, 764,485.31 and 312,350.12 is: 431,017.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,008.15 : 764,485.31 = 312,350.12 : x
  2. Step 2: Convert to fraction form
    554,008.15/764,485.31 = 312,350.12/x
  3. Step 3: Cross multiply
    554,008.15x = 764,485.31 × 312,350.12
  4. Step 4: Simplify right side
    554,008.15x = 238,787,075,275.19
  5. Step 5: Solve for x
    x = 238,787,075,275.19/554,008.15
  6. Step 6: Final answer
    x = 431,017.26

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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.