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Finding the Fourth Proportional to 630,291.51, 869,807.84 and 343,812.87

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Solution

The fourth proportional to 630,291.51, 869,807.84 and 343,812.87 is: 474,464.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,291.51 : 869,807.84 = 343,812.87 : x
  2. Step 2: Convert to fraction form
    630,291.51/869,807.84 = 343,812.87/x
  3. Step 3: Cross multiply
    630,291.51x = 869,807.84 × 343,812.87
  4. Step 4: Simplify right side
    630,291.51x = 299,051,129,818.90
  5. Step 5: Solve for x
    x = 299,051,129,818.90/630,291.51
  6. Step 6: Final answer
    x = 474,464.79

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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.