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Finding the Fourth Proportional to 581,443.60, 872,165.40 and 422,813.20

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Solution

The fourth proportional to 581,443.60, 872,165.40 and 422,813.20 is: 634,219.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,443.60 : 872,165.40 = 422,813.20 : x
  2. Step 2: Convert to fraction form
    581,443.60/872,165.40 = 422,813.20/x
  3. Step 3: Cross multiply
    581,443.60x = 872,165.40 × 422,813.20
  4. Step 4: Simplify right side
    581,443.60x = 368,763,043,703.28
  5. Step 5: Solve for x
    x = 368,763,043,703.28/581,443.60
  6. Step 6: Final answer
    x = 634,219.80

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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.