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Finding the Fourth Proportional to 570,616.13, 787,444.61 and 308,970.18

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Solution

The fourth proportional to 570,616.13, 787,444.61 and 308,970.18 is: 426,375.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,616.13 : 787,444.61 = 308,970.18 : x
  2. Step 2: Convert to fraction form
    570,616.13/787,444.61 = 308,970.18/x
  3. Step 3: Cross multiply
    570,616.13x = 787,444.61 × 308,970.18
  4. Step 4: Simplify right side
    570,616.13x = 243,296,902,891.73
  5. Step 5: Solve for x
    x = 243,296,902,891.73/570,616.13
  6. Step 6: Final answer
    x = 426,375.79

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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.