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Finding the Fourth Proportional to 268,864.40, 403,296.60 and 257,346.20

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Solution

The fourth proportional to 268,864.40, 403,296.60 and 257,346.20 is: 386,019.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,864.40 : 403,296.60 = 257,346.20 : x
  2. Step 2: Convert to fraction form
    268,864.40/403,296.60 = 257,346.20/x
  3. Step 3: Cross multiply
    268,864.40x = 403,296.60 × 257,346.20
  4. Step 4: Simplify right side
    268,864.40x = 103,786,847,482.92
  5. Step 5: Solve for x
    x = 103,786,847,482.92/268,864.40
  6. Step 6: Final answer
    x = 386,019.30

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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.