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Finding the Fourth Proportional to 630,090,798.72, 869,539,221.45 and 347,832,571.02

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Solution

The fourth proportional to 630,090,798.72, 869,539,221.45 and 347,832,571.02 is: 480,016,631.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,090,798.72 : 869,539,221.45 = 347,832,571.02 : x
  2. Step 2: Convert to fraction form
    630,090,798.72/869,539,221.45 = 347,832,571.02/x
  3. Step 3: Cross multiply
    630,090,798.72x = 869,539,221.45 × 347,832,571.02
  4. Step 4: Simplify right side
    630,090,798.72x = 302,454,062,999,682,624
  5. Step 5: Solve for x
    x = 302,454,062,999,682,624/630,090,798.72
  6. Step 6: Final answer
    x = 480,016,631.91

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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.