Home / 1,290,081,715.85-1,780,261,489.35-761,615,936.16

Finding the Fourth Proportional to 1,290,081,715.85, 1,780,261,489.35 and 761,615,936.16

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Solution

The fourth proportional to 1,290,081,715.85, 1,780,261,489.35 and 761,615,936.16 is: 1,050,999,718.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,081,715.85 : 1,780,261,489.35 = 761,615,936.16 : x
  2. Step 2: Convert to fraction form
    1,290,081,715.85/1,780,261,489.35 = 761,615,936.16/x
  3. Step 3: Cross multiply
    1,290,081,715.85x = 1,780,261,489.35 × 761,615,936.16
  4. Step 4: Simplify right side
    1,290,081,715.85x = 1,355,875,520,820,896,000
  5. Step 5: Solve for x
    x = 1,355,875,520,820,896,000/1,290,081,715.85
  6. Step 6: Final answer
    x = 1,050,999,718.99

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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.