Home / 520,220,698.61-780,136,629.08-209,223,344.70

Finding the Fourth Proportional to 520,220,698.61, 780,136,629.08 and 209,223,344.70

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Solution

The fourth proportional to 520,220,698.61, 780,136,629.08 and 209,223,344.70 is: 313,756,825.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,220,698.61 : 780,136,629.08 = 209,223,344.70 : x
  2. Step 2: Convert to fraction form
    520,220,698.61/780,136,629.08 = 209,223,344.70/x
  3. Step 3: Cross multiply
    520,220,698.61x = 780,136,629.08 × 209,223,344.70
  4. Step 4: Simplify right side
    520,220,698.61x = 163,222,794,858,054,752
  5. Step 5: Solve for x
    x = 163,222,794,858,054,752/520,220,698.61
  6. Step 6: Final answer
    x = 313,756,825.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.