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Finding the Fourth Proportional to 614,300.80, 921,451.20 and 561,156.70

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Solution

The fourth proportional to 614,300.80, 921,451.20 and 561,156.70 is: 841,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,300.80 : 921,451.20 = 561,156.70 : x
  2. Step 2: Convert to fraction form
    614,300.80/921,451.20 = 561,156.70/x
  3. Step 3: Cross multiply
    614,300.80x = 921,451.20 × 561,156.70
  4. Step 4: Simplify right side
    614,300.80x = 517,078,514,603.04
  5. Step 5: Solve for x
    x = 517,078,514,603.04/614,300.80
  6. Step 6: Final answer
    x = 841,735.05

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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.