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Finding the Fourth Proportional to 887,999.40, 1,331,999.10 and 389,363.40

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Solution

The fourth proportional to 887,999.40, 1,331,999.10 and 389,363.40 is: 584,045.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,999.40 : 1,331,999.10 = 389,363.40 : x
  2. Step 2: Convert to fraction form
    887,999.40/1,331,999.10 = 389,363.40/x
  3. Step 3: Cross multiply
    887,999.40x = 1,331,999.10 × 389,363.40
  4. Step 4: Simplify right side
    887,999.40x = 518,631,698,372.94
  5. Step 5: Solve for x
    x = 518,631,698,372.94/887,999.40
  6. Step 6: Final answer
    x = 584,045.10

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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.