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Finding the Fourth Proportional to 623,145.70, 934,718.55 and 619,209.10

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Solution

The fourth proportional to 623,145.70, 934,718.55 and 619,209.10 is: 928,813.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,145.70 : 934,718.55 = 619,209.10 : x
  2. Step 2: Convert to fraction form
    623,145.70/934,718.55 = 619,209.10/x
  3. Step 3: Cross multiply
    623,145.70x = 934,718.55 × 619,209.10
  4. Step 4: Simplify right side
    623,145.70x = 578,786,232,098.81
  5. Step 5: Solve for x
    x = 578,786,232,098.81/623,145.70
  6. Step 6: Final answer
    x = 928,813.65

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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.