Home / 513,921,964.97-709,213,211.36-278,972,784.60

Finding the Fourth Proportional to 513,921,964.97, 709,213,211.36 and 278,972,784.60

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Solution

The fourth proportional to 513,921,964.97, 709,213,211.36 and 278,972,784.60 is: 384,982,931.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,921,964.97 : 709,213,211.36 = 278,972,784.60 : x
  2. Step 2: Convert to fraction form
    513,921,964.97/709,213,211.36 = 278,972,784.60/x
  3. Step 3: Cross multiply
    513,921,964.97x = 709,213,211.36 × 278,972,784.60
  4. Step 4: Simplify right side
    513,921,964.97x = 197,851,184,449,178,240
  5. Step 5: Solve for x
    x = 197,851,184,449,178,240/513,921,964.97
  6. Step 6: Final answer
    x = 384,982,931.14

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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.