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Finding the Fourth Proportional to 539,543.80, 809,315.70 and 516,507.40

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Solution

The fourth proportional to 539,543.80, 809,315.70 and 516,507.40 is: 774,761.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,543.80 : 809,315.70 = 516,507.40 : x
  2. Step 2: Convert to fraction form
    539,543.80/809,315.70 = 516,507.40/x
  3. Step 3: Cross multiply
    539,543.80x = 809,315.70 × 516,507.40
  4. Step 4: Simplify right side
    539,543.80x = 418,017,547,986.18
  5. Step 5: Solve for x
    x = 418,017,547,986.18/539,543.80
  6. Step 6: Final answer
    x = 774,761.10

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Similar ratio
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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.