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Finding the Fourth Proportional to 428,642.60, 591,563 and 237,717.50

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Solution

The fourth proportional to 428,642.60, 591,563 and 237,717.50 is: 328,070.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,642.60 : 591,563 = 237,717.50 : x
  2. Step 2: Convert to fraction form
    428,642.60/591,563 = 237,717.50/x
  3. Step 3: Cross multiply
    428,642.60x = 591,563 × 237,717.50
  4. Step 4: Simplify right side
    428,642.60x = 140,624,877,452.50
  5. Step 5: Solve for x
    x = 140,624,877,452.50/428,642.60
  6. Step 6: Final answer
    x = 328,070.23

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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.