Home / 678,078.20-1,017,117.30-528,430.70

Finding the Fourth Proportional to 678,078.20, 1,017,117.30 and 528,430.70

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Solution

The fourth proportional to 678,078.20, 1,017,117.30 and 528,430.70 is: 792,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,078.20 : 1,017,117.30 = 528,430.70 : x
  2. Step 2: Convert to fraction form
    678,078.20/1,017,117.30 = 528,430.70/x
  3. Step 3: Cross multiply
    678,078.20x = 1,017,117.30 × 528,430.70
  4. Step 4: Simplify right side
    678,078.20x = 537,476,006,821.11
  5. Step 5: Solve for x
    x = 537,476,006,821.11/678,078.20
  6. Step 6: Final answer
    x = 792,646.05

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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.