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Finding the Fourth Proportional to 390,364.86, 538,673.58 and 237,381.92

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Solution

The fourth proportional to 390,364.86, 538,673.58 and 237,381.92 is: 327,568.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,364.86 : 538,673.58 = 237,381.92 : x
  2. Step 2: Convert to fraction form
    390,364.86/538,673.58 = 237,381.92/x
  3. Step 3: Cross multiply
    390,364.86x = 538,673.58 × 237,381.92
  4. Step 4: Simplify right side
    390,364.86x = 127,871,365,980.31
  5. Step 5: Solve for x
    x = 127,871,365,980.31/390,364.86
  6. Step 6: Final answer
    x = 327,568.84

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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.