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Finding the Fourth Proportional to 387,944.40, 535,436.76 and 242,817.48

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Solution

The fourth proportional to 387,944.40, 535,436.76 and 242,817.48 is: 335,134.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,944.40 : 535,436.76 = 242,817.48 : x
  2. Step 2: Convert to fraction form
    387,944.40/535,436.76 = 242,817.48/x
  3. Step 3: Cross multiply
    387,944.40x = 535,436.76 × 242,817.48
  4. Step 4: Simplify right side
    387,944.40x = 130,013,404,762.57
  5. Step 5: Solve for x
    x = 130,013,404,762.57/387,944.40
  6. Step 6: Final answer
    x = 335,134.12

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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.