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Finding the Fourth Proportional to 632,118.48, 872,323.47 and 345,638.76

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Solution

The fourth proportional to 632,118.48, 872,323.47 and 345,638.76 is: 476,981.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,118.48 : 872,323.47 = 345,638.76 : x
  2. Step 2: Convert to fraction form
    632,118.48/872,323.47 = 345,638.76/x
  3. Step 3: Cross multiply
    632,118.48x = 872,323.47 × 345,638.76
  4. Step 4: Simplify right side
    632,118.48x = 301,508,802,489.70
  5. Step 5: Solve for x
    x = 301,508,802,489.70/632,118.48
  6. Step 6: Final answer
    x = 476,981.47

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Half scale
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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.