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Finding the Fourth Proportional to 876,889,728.62, 1,210,107,644.79 and 480,426,781.58

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Solution

The fourth proportional to 876,889,728.62, 1,210,107,644.79 and 480,426,781.58 is: 662,988,859.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,889,728.62 : 1,210,107,644.79 = 480,426,781.58 : x
  2. Step 2: Convert to fraction form
    876,889,728.62/1,210,107,644.79 = 480,426,781.58/x
  3. Step 3: Cross multiply
    876,889,728.62x = 1,210,107,644.79 × 480,426,781.58
  4. Step 4: Simplify right side
    876,889,728.62x = 581,368,121,151,813,504
  5. Step 5: Solve for x
    x = 581,368,121,151,813,504/876,889,728.62
  6. Step 6: Final answer
    x = 662,988,859.58

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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.