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Finding the Fourth Proportional to 452,056.40, 678,862.20 and 319,864.40

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Solution

The fourth proportional to 452,056.40, 678,862.20 and 319,864.40 is: 480,346.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,056.40 : 678,862.20 = 319,864.40 : x
  2. Step 2: Convert to fraction form
    452,056.40/678,862.20 = 319,864.40/x
  3. Step 3: Cross multiply
    452,056.40x = 678,862.20 × 319,864.40
  4. Step 4: Simplify right side
    452,056.40x = 217,143,850,285.68
  5. Step 5: Solve for x
    x = 217,143,850,285.68/452,056.40
  6. Step 6: Final answer
    x = 480,346.81

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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.