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Finding the Fourth Proportional to 268,270.80, 402,260.40 and 90,686.40

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Solution

The fourth proportional to 268,270.80, 402,260.40 and 90,686.40 is: 135,980.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,270.80 : 402,260.40 = 90,686.40 : x
  2. Step 2: Convert to fraction form
    268,270.80/402,260.40 = 90,686.40/x
  3. Step 3: Cross multiply
    268,270.80x = 402,260.40 × 90,686.40
  4. Step 4: Simplify right side
    268,270.80x = 36,479,547,538.56
  5. Step 5: Solve for x
    x = 36,479,547,538.56/268,270.80
  6. Step 6: Final answer
    x = 135,980.31

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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.