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Finding the Fourth Proportional to 587,209.40, 880,814.10 and 390,217.40

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Solution

The fourth proportional to 587,209.40, 880,814.10 and 390,217.40 is: 585,326.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,209.40 : 880,814.10 = 390,217.40 : x
  2. Step 2: Convert to fraction form
    587,209.40/880,814.10 = 390,217.40/x
  3. Step 3: Cross multiply
    587,209.40x = 880,814.10 × 390,217.40
  4. Step 4: Simplify right side
    587,209.40x = 343,708,987,985.34
  5. Step 5: Solve for x
    x = 343,708,987,985.34/587,209.40
  6. Step 6: Final answer
    x = 585,326.10

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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.