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Finding the Fourth Proportional to 620,543.10, 930,814.65 and 384,347.10

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Solution

The fourth proportional to 620,543.10, 930,814.65 and 384,347.10 is: 576,520.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,543.10 : 930,814.65 = 384,347.10 : x
  2. Step 2: Convert to fraction form
    620,543.10/930,814.65 = 384,347.10/x
  3. Step 3: Cross multiply
    620,543.10x = 930,814.65 × 384,347.10
  4. Step 4: Simplify right side
    620,543.10x = 357,755,911,365.02
  5. Step 5: Solve for x
    x = 357,755,911,365.02/620,543.10
  6. Step 6: Final answer
    x = 576,520.65

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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.