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Finding the Fourth Proportional to 387,638.40, 581,476.80 and 201,014.40

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Solution

The fourth proportional to 387,638.40, 581,476.80 and 201,014.40 is: 301,531.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,638.40 : 581,476.80 = 201,014.40 : x
  2. Step 2: Convert to fraction form
    387,638.40/581,476.80 = 201,014.40/x
  3. Step 3: Cross multiply
    387,638.40x = 581,476.80 × 201,014.40
  4. Step 4: Simplify right side
    387,638.40x = 116,885,210,065.92
  5. Step 5: Solve for x
    x = 116,885,210,065.92/387,638.40
  6. Step 6: Final answer
    x = 301,531.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.