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Finding the Fourth Proportional to 628,639,798, 867,882,507.80 and 417,233,316.64

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Solution

The fourth proportional to 628,639,798, 867,882,507.80 and 417,233,316.64 is: 576,020,637.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,639,798 : 867,882,507.80 = 417,233,316.64 : x
  2. Step 2: Convert to fraction form
    628,639,798/867,882,507.80 = 417,233,316.64/x
  3. Step 3: Cross multiply
    628,639,798x = 867,882,507.80 × 417,233,316.64
  4. Step 4: Simplify right side
    628,639,798x = 362,109,497,183,234,624
  5. Step 5: Solve for x
    x = 362,109,497,183,234,624/628,639,798
  6. Step 6: Final answer
    x = 576,020,637.47

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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.