Home / 638,543.20-957,814.80-389,711.20

Finding the Fourth Proportional to 638,543.20, 957,814.80 and 389,711.20

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Solution

The fourth proportional to 638,543.20, 957,814.80 and 389,711.20 is: 584,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,543.20 : 957,814.80 = 389,711.20 : x
  2. Step 2: Convert to fraction form
    638,543.20/957,814.80 = 389,711.20/x
  3. Step 3: Cross multiply
    638,543.20x = 957,814.80 × 389,711.20
  4. Step 4: Simplify right side
    638,543.20x = 373,271,155,085.76
  5. Step 5: Solve for x
    x = 373,271,155,085.76/638,543.20
  6. Step 6: Final answer
    x = 584,566.80

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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.