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Finding the Fourth Proportional to 287,856.40, 431,784.60 and 100,848.40

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Solution

The fourth proportional to 287,856.40, 431,784.60 and 100,848.40 is: 151,272.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,856.40 : 431,784.60 = 100,848.40 : x
  2. Step 2: Convert to fraction form
    287,856.40/431,784.60 = 100,848.40/x
  3. Step 3: Cross multiply
    287,856.40x = 431,784.60 × 100,848.40
  4. Step 4: Simplify right side
    287,856.40x = 43,544,786,054.64
  5. Step 5: Solve for x
    x = 43,544,786,054.64/287,856.40
  6. Step 6: Final answer
    x = 151,272.60

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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.