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Finding the Fourth Proportional to 545,871.60, 818,807.40 and 405,903.60

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Solution

The fourth proportional to 545,871.60, 818,807.40 and 405,903.60 is: 608,855.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,871.60 : 818,807.40 = 405,903.60 : x
  2. Step 2: Convert to fraction form
    545,871.60/818,807.40 = 405,903.60/x
  3. Step 3: Cross multiply
    545,871.60x = 818,807.40 × 405,903.60
  4. Step 4: Simplify right side
    545,871.60x = 332,356,871,366.64
  5. Step 5: Solve for x
    x = 332,356,871,366.64/545,871.60
  6. Step 6: Final answer
    x = 608,855.40

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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.