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Finding the Fourth Proportional to 561,640.60, 842,460.90 and 402,208.30

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Solution

The fourth proportional to 561,640.60, 842,460.90 and 402,208.30 is: 603,312.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,640.60 : 842,460.90 = 402,208.30 : x
  2. Step 2: Convert to fraction form
    561,640.60/842,460.90 = 402,208.30/x
  3. Step 3: Cross multiply
    561,640.60x = 842,460.90 × 402,208.30
  4. Step 4: Simplify right side
    561,640.60x = 338,844,766,405.47
  5. Step 5: Solve for x
    x = 338,844,766,405.47/561,640.60
  6. Step 6: Final answer
    x = 603,312.45

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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.