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Finding the Fourth Proportional to 631,148.75, 870,394.05 and 502,511.86

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Solution

The fourth proportional to 631,148.75, 870,394.05 and 502,511.86 is: 692,995.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,148.75 : 870,394.05 = 502,511.86 : x
  2. Step 2: Convert to fraction form
    631,148.75/870,394.05 = 502,511.86/x
  3. Step 3: Cross multiply
    631,148.75x = 870,394.05 × 502,511.86
  4. Step 4: Simplify right side
    631,148.75x = 437,383,326,133.90
  5. Step 5: Solve for x
    x = 437,383,326,133.90/631,148.75
  6. Step 6: Final answer
    x = 692,995.64

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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.