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Finding the Fourth Proportional to 400,928.68, 553,281.54 and 239,783.71

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Solution

The fourth proportional to 400,928.68, 553,281.54 and 239,783.71 is: 330,901.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,928.68 : 553,281.54 = 239,783.71 : x
  2. Step 2: Convert to fraction form
    400,928.68/553,281.54 = 239,783.71/x
  3. Step 3: Cross multiply
    400,928.68x = 553,281.54 × 239,783.71
  4. Step 4: Simplify right side
    400,928.68x = 132,667,900,335.71
  5. Step 5: Solve for x
    x = 132,667,900,335.71/400,928.68
  6. Step 6: Final answer
    x = 330,901.50

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1.5x scale

Why These Related Problems?

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