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Finding the Fourth Proportional to 285,637.60, 428,456.40 and 240,018.40

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Solution

The fourth proportional to 285,637.60, 428,456.40 and 240,018.40 is: 360,027.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,637.60 : 428,456.40 = 240,018.40 : x
  2. Step 2: Convert to fraction form
    285,637.60/428,456.40 = 240,018.40/x
  3. Step 3: Cross multiply
    285,637.60x = 428,456.40 × 240,018.40
  4. Step 4: Simplify right side
    285,637.60x = 102,837,419,597.76
  5. Step 5: Solve for x
    x = 102,837,419,597.76/285,637.60
  6. Step 6: Final answer
    x = 360,027.60

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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.