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Finding the Fourth Proportional to 554,063.64, 764,534.16 and 312,356.40

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Solution

The fourth proportional to 554,063.64, 764,534.16 and 312,356.40 is: 431,010.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,063.64 : 764,534.16 = 312,356.40 : x
  2. Step 2: Convert to fraction form
    554,063.64/764,534.16 = 312,356.40/x
  3. Step 3: Cross multiply
    554,063.64x = 764,534.16 × 312,356.40
  4. Step 4: Simplify right side
    554,063.64x = 238,807,137,894.62
  5. Step 5: Solve for x
    x = 238,807,137,894.62/554,063.64
  6. Step 6: Final answer
    x = 431,010.30

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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.