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Finding the Fourth Proportional to 586,391.80, 879,587.70 and 383,438.20

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Solution

The fourth proportional to 586,391.80, 879,587.70 and 383,438.20 is: 575,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,391.80 : 879,587.70 = 383,438.20 : x
  2. Step 2: Convert to fraction form
    586,391.80/879,587.70 = 383,438.20/x
  3. Step 3: Cross multiply
    586,391.80x = 879,587.70 × 383,438.20
  4. Step 4: Simplify right side
    586,391.80x = 337,267,524,430.14
  5. Step 5: Solve for x
    x = 337,267,524,430.14/586,391.80
  6. Step 6: Final answer
    x = 575,157.30

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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.