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Finding the Fourth Proportional to 623,990.40, 935,985.60 and 503,721.60

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Solution

The fourth proportional to 623,990.40, 935,985.60 and 503,721.60 is: 755,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,990.40 : 935,985.60 = 503,721.60 : x
  2. Step 2: Convert to fraction form
    623,990.40/935,985.60 = 503,721.60/x
  3. Step 3: Cross multiply
    623,990.40x = 935,985.60 × 503,721.60
  4. Step 4: Simplify right side
    623,990.40x = 471,476,164,008.96
  5. Step 5: Solve for x
    x = 471,476,164,008.96/623,990.40
  6. Step 6: Final answer
    x = 755,582.40

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Double scale
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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.