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Finding the Fourth Proportional to 400,972, 553,341.36 and 239,833.84

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Solution

The fourth proportional to 400,972, 553,341.36 and 239,833.84 is: 330,970.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,972 : 553,341.36 = 239,833.84 : x
  2. Step 2: Convert to fraction form
    400,972/553,341.36 = 239,833.84/x
  3. Step 3: Cross multiply
    400,972x = 553,341.36 × 239,833.84
  4. Step 4: Simplify right side
    400,972x = 132,709,983,199.62
  5. Step 5: Solve for x
    x = 132,709,983,199.62/400,972
  6. Step 6: Final answer
    x = 330,970.70

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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.