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Finding the Fourth Proportional to 570,374.20, 787,116.40 and 315,725.39

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Solution

The fourth proportional to 570,374.20, 787,116.40 and 315,725.39 is: 435,701.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,374.20 : 787,116.40 = 315,725.39 : x
  2. Step 2: Convert to fraction form
    570,374.20/787,116.40 = 315,725.39/x
  3. Step 3: Cross multiply
    570,374.20x = 787,116.40 × 315,725.39
  4. Step 4: Simplify right side
    570,374.20x = 248,512,627,640.50
  5. Step 5: Solve for x
    x = 248,512,627,640.50/570,374.20
  6. Step 6: Final answer
    x = 435,701.03

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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.