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Finding the Fourth Proportional to 540,045.20, 809,095.80 and 428,459.60

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Solution

The fourth proportional to 540,045.20, 809,095.80 and 428,459.60 is: 641,918.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,045.20 : 809,095.80 = 428,459.60 : x
  2. Step 2: Convert to fraction form
    540,045.20/809,095.80 = 428,459.60/x
  3. Step 3: Cross multiply
    540,045.20x = 809,095.80 × 428,459.60
  4. Step 4: Simplify right side
    540,045.20x = 346,664,862,829.68
  5. Step 5: Solve for x
    x = 346,664,862,829.68/540,045.20
  6. Step 6: Final answer
    x = 641,918.24

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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.