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Finding the Fourth Proportional to 640,345.47, 883,601.49 and 353,848.47

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Solution

The fourth proportional to 640,345.47, 883,601.49 and 353,848.47 is: 488,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,345.47 : 883,601.49 = 353,848.47 : x
  2. Step 2: Convert to fraction form
    640,345.47/883,601.49 = 353,848.47/x
  3. Step 3: Cross multiply
    640,345.47x = 883,601.49 × 353,848.47
  4. Step 4: Simplify right side
    640,345.47x = 312,661,033,339.65
  5. Step 5: Solve for x
    x = 312,661,033,339.65/640,345.47
  6. Step 6: Final answer
    x = 488,269.30

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1.5x scale

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.