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Finding the Fourth Proportional to 586,986.20, 879,701.70 and 520,112.60

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Solution

The fourth proportional to 586,986.20, 879,701.70 and 520,112.60 is: 779,479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,986.20 : 879,701.70 = 520,112.60 : x
  2. Step 2: Convert to fraction form
    586,986.20/879,701.70 = 520,112.60/x
  3. Step 3: Cross multiply
    586,986.20x = 879,701.70 × 520,112.60
  4. Step 4: Simplify right side
    586,986.20x = 457,543,938,411.42
  5. Step 5: Solve for x
    x = 457,543,938,411.42/586,986.20
  6. Step 6: Final answer
    x = 779,479.89

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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.