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Finding the Fourth Proportional to 623,865.40, 935,798.10 and 340,430.20

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Solution

The fourth proportional to 623,865.40, 935,798.10 and 340,430.20 is: 510,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,865.40 : 935,798.10 = 340,430.20 : x
  2. Step 2: Convert to fraction form
    623,865.40/935,798.10 = 340,430.20/x
  3. Step 3: Cross multiply
    623,865.40x = 935,798.10 × 340,430.20
  4. Step 4: Simplify right side
    623,865.40x = 318,573,934,342.62
  5. Step 5: Solve for x
    x = 318,573,934,342.62/623,865.40
  6. Step 6: Final answer
    x = 510,645.30

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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.