Home / 515,558,965.40-772,666,601.70-208,599,810.20

Finding the Fourth Proportional to 515,558,965.40, 772,666,601.70 and 208,599,810.20

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Solution

The fourth proportional to 515,558,965.40, 772,666,601.70 and 208,599,810.20 is: 312,627,880.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,558,965.40 : 772,666,601.70 = 208,599,810.20 : x
  2. Step 2: Convert to fraction form
    515,558,965.40/772,666,601.70 = 208,599,810.20/x
  3. Step 3: Cross multiply
    515,558,965.40x = 772,666,601.70 × 208,599,810.20
  4. Step 4: Simplify right side
    515,558,965.40x = 161,178,106,462,499,008
  5. Step 5: Solve for x
    x = 161,178,106,462,499,008/515,558,965.40
  6. Step 6: Final answer
    x = 312,627,880.18

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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.