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Finding the Fourth Proportional to 287,688.60, 431,532.90 and 262,805.40

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Solution

The fourth proportional to 287,688.60, 431,532.90 and 262,805.40 is: 394,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,688.60 : 431,532.90 = 262,805.40 : x
  2. Step 2: Convert to fraction form
    287,688.60/431,532.90 = 262,805.40/x
  3. Step 3: Cross multiply
    287,688.60x = 431,532.90 × 262,805.40
  4. Step 4: Simplify right side
    287,688.60x = 113,409,176,397.66
  5. Step 5: Solve for x
    x = 113,409,176,397.66/287,688.60
  6. Step 6: Final answer
    x = 394,208.10

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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.