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Finding the Fourth Proportional to 586,431.80, 879,647.70 and 383,478.20

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Solution

The fourth proportional to 586,431.80, 879,647.70 and 383,478.20 is: 575,217.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,431.80 : 879,647.70 = 383,478.20 : x
  2. Step 2: Convert to fraction form
    586,431.80/879,647.70 = 383,478.20/x
  3. Step 3: Cross multiply
    586,431.80x = 879,647.70 × 383,478.20
  4. Step 4: Simplify right side
    586,431.80x = 337,325,716,630.14
  5. Step 5: Solve for x
    x = 337,325,716,630.14/586,431.80
  6. Step 6: Final answer
    x = 575,217.30

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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.