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Finding the Fourth Proportional to 519,853.70, 779,780.55 and 458,836.40

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Solution

The fourth proportional to 519,853.70, 779,780.55 and 458,836.40 is: 688,254.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,853.70 : 779,780.55 = 458,836.40 : x
  2. Step 2: Convert to fraction form
    519,853.70/779,780.55 = 458,836.40/x
  3. Step 3: Cross multiply
    519,853.70x = 779,780.55 × 458,836.40
  4. Step 4: Simplify right side
    519,853.70x = 357,791,700,352.02
  5. Step 5: Solve for x
    x = 357,791,700,352.02/519,853.70
  6. Step 6: Final answer
    x = 688,254.60

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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.