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Finding the Fourth Proportional to 623,856.60, 935,784.90 and 340,421.40

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Solution

The fourth proportional to 623,856.60, 935,784.90 and 340,421.40 is: 510,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,856.60 : 935,784.90 = 340,421.40 : x
  2. Step 2: Convert to fraction form
    623,856.60/935,784.90 = 340,421.40/x
  3. Step 3: Cross multiply
    623,856.60x = 935,784.90 × 340,421.40
  4. Step 4: Simplify right side
    623,856.60x = 318,561,205,756.86
  5. Step 5: Solve for x
    x = 318,561,205,756.86/623,856.60
  6. Step 6: Final answer
    x = 510,632.10

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Double scale
Find fourth proportional to 623,857.60, 935,786.40 and 340,422.40
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.