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Finding the Fourth Proportional to 287,659.60, 432,007.80 and 208,862.80

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Solution

The fourth proportional to 287,659.60, 432,007.80 and 208,862.80 is: 313,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,659.60 : 432,007.80 = 208,862.80 : x
  2. Step 2: Convert to fraction form
    287,659.60/432,007.80 = 208,862.80/x
  3. Step 3: Cross multiply
    287,659.60x = 432,007.80 × 208,862.80
  4. Step 4: Simplify right side
    287,659.60x = 90,230,358,729.84
  5. Step 5: Solve for x
    x = 90,230,358,729.84/287,659.60
  6. Step 6: Final answer
    x = 313,670.60

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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.