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Finding the Fourth Proportional to 570,560.39, 787,373.40 and 315,911.58

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Solution

The fourth proportional to 570,560.39, 787,373.40 and 315,911.58 is: 435,958.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,560.39 : 787,373.40 = 315,911.58 : x
  2. Step 2: Convert to fraction form
    570,560.39/787,373.40 = 315,911.58/x
  3. Step 3: Cross multiply
    570,560.39x = 787,373.40 × 315,911.58
  4. Step 4: Simplify right side
    570,560.39x = 248,740,374,843.97
  5. Step 5: Solve for x
    x = 248,740,374,843.97/570,560.39
  6. Step 6: Final answer
    x = 435,958.01

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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.