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Finding the Fourth Proportional to 285,534.60, 428,301.90 and 256,043.40

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Solution

The fourth proportional to 285,534.60, 428,301.90 and 256,043.40 is: 384,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,534.60 : 428,301.90 = 256,043.40 : x
  2. Step 2: Convert to fraction form
    285,534.60/428,301.90 = 256,043.40/x
  3. Step 3: Cross multiply
    285,534.60x = 428,301.90 × 256,043.40
  4. Step 4: Simplify right side
    285,534.60x = 109,663,874,702.46
  5. Step 5: Solve for x
    x = 109,663,874,702.46/285,534.60
  6. Step 6: Final answer
    x = 384,065.10

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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.