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Finding the Fourth Proportional to 287,923.70, 402,568.30 and 287,923.70

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Solution

The fourth proportional to 287,923.70, 402,568.30 and 287,923.70 is: 402,568.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,923.70 : 402,568.30 = 287,923.70 : x
  2. Step 2: Convert to fraction form
    287,923.70/402,568.30 = 287,923.70/x
  3. Step 3: Cross multiply
    287,923.70x = 402,568.30 × 287,923.70
  4. Step 4: Simplify right side
    287,923.70x = 115,908,954,438.71
  5. Step 5: Solve for x
    x = 115,908,954,438.71/287,923.70
  6. Step 6: Final answer
    x = 402,568.30

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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.