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Finding the Fourth Proportional to 400,909.40, 553,045.25 and 247,898.68

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Solution

The fourth proportional to 400,909.40, 553,045.25 and 247,898.68 is: 341,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,909.40 : 553,045.25 = 247,898.68 : x
  2. Step 2: Convert to fraction form
    400,909.40/553,045.25 = 247,898.68/x
  3. Step 3: Cross multiply
    400,909.40x = 553,045.25 × 247,898.68
  4. Step 4: Simplify right side
    400,909.40x = 137,099,186,692.40
  5. Step 5: Solve for x
    x = 137,099,186,692.40/400,909.40
  6. Step 6: Final answer
    x = 341,970.50

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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.