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Finding the Fourth Proportional to 630,172.51, 869,712.80 and 358,281.43

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Solution

The fourth proportional to 630,172.51, 869,712.80 and 358,281.43 is: 494,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,172.51 : 869,712.80 = 358,281.43 : x
  2. Step 2: Convert to fraction form
    630,172.51/869,712.80 = 358,281.43/x
  3. Step 3: Cross multiply
    630,172.51x = 869,712.80 × 358,281.43
  4. Step 4: Simplify right side
    630,172.51x = 311,601,945,673.30
  5. Step 5: Solve for x
    x = 311,601,945,673.30/630,172.51
  6. Step 6: Final answer
    x = 494,470.86

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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.