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Finding the Fourth Proportional to 619,907.60, 929,861.40 and 514,931.60

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Solution

The fourth proportional to 619,907.60, 929,861.40 and 514,931.60 is: 772,397.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,907.60 : 929,861.40 = 514,931.60 : x
  2. Step 2: Convert to fraction form
    619,907.60/929,861.40 = 514,931.60/x
  3. Step 3: Cross multiply
    619,907.60x = 929,861.40 × 514,931.60
  4. Step 4: Simplify right side
    619,907.60x = 478,815,018,480.24
  5. Step 5: Solve for x
    x = 478,815,018,480.24/619,907.60
  6. Step 6: Final answer
    x = 772,397.40

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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.