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Finding the Fourth Proportional to 387,875.34, 535,264.47 and 218,110.68

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Solution

The fourth proportional to 387,875.34, 535,264.47 and 218,110.68 is: 300,990.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,875.34 : 535,264.47 = 218,110.68 : x
  2. Step 2: Convert to fraction form
    387,875.34/535,264.47 = 218,110.68/x
  3. Step 3: Cross multiply
    387,875.34x = 535,264.47 × 218,110.68
  4. Step 4: Simplify right side
    387,875.34x = 116,746,897,531.54
  5. Step 5: Solve for x
    x = 116,746,897,531.54/387,875.34
  6. Step 6: Final answer
    x = 300,990.77

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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.