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Finding the Fourth Proportional to 287,999.80, 402,266.60 and 287,999.80

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Solution

The fourth proportional to 287,999.80, 402,266.60 and 287,999.80 is: 402,266.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,999.80 : 402,266.60 = 287,999.80 : x
  2. Step 2: Convert to fraction form
    287,999.80/402,266.60 = 287,999.80/x
  3. Step 3: Cross multiply
    287,999.80x = 402,266.60 × 287,999.80
  4. Step 4: Simplify right side
    287,999.80x = 115,852,700,346.68
  5. Step 5: Solve for x
    x = 115,852,700,346.68/287,999.80
  6. Step 6: Final answer
    x = 402,266.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.