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Finding the Fourth Proportional to 621,264.47, 930,530.71 and 513,426.23

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Solution

The fourth proportional to 621,264.47, 930,530.71 and 513,426.23 is: 769,010.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,264.47 : 930,530.71 = 513,426.23 : x
  2. Step 2: Convert to fraction form
    621,264.47/930,530.71 = 513,426.23/x
  3. Step 3: Cross multiply
    621,264.47x = 930,530.71 × 513,426.23
  4. Step 4: Simplify right side
    621,264.47x = 477,758,874,334.52
  5. Step 5: Solve for x
    x = 477,758,874,334.52/621,264.47
  6. Step 6: Final answer
    x = 769,010.46

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Half scale
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Double scale
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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.