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Finding the Fourth Proportional to 708,956.28, 978,328.80 and 386,668.08

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Solution

The fourth proportional to 708,956.28, 978,328.80 and 386,668.08 is: 533,585.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,956.28 : 978,328.80 = 386,668.08 : x
  2. Step 2: Convert to fraction form
    708,956.28/978,328.80 = 386,668.08/x
  3. Step 3: Cross multiply
    708,956.28x = 978,328.80 × 386,668.08
  4. Step 4: Simplify right side
    708,956.28x = 378,288,518,704.70
  5. Step 5: Solve for x
    x = 378,288,518,704.70/708,956.28
  6. Step 6: Final answer
    x = 533,585.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.