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Finding the Fourth Proportional to 638,590.83, 880,339.67 and 502,388.23

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Solution

The fourth proportional to 638,590.83, 880,339.67 and 502,388.23 is: 692,575.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,590.83 : 880,339.67 = 502,388.23 : x
  2. Step 2: Convert to fraction form
    638,590.83/880,339.67 = 502,388.23/x
  3. Step 3: Cross multiply
    638,590.83x = 880,339.67 × 502,388.23
  4. Step 4: Simplify right side
    638,590.83x = 442,272,285,781.25
  5. Step 5: Solve for x
    x = 442,272,285,781.25/638,590.83
  6. Step 6: Final answer
    x = 692,575.38

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Double scale
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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.