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Finding the Fourth Proportional to 821,630.40, 1,230,026.40 and 612,196.80

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Solution

The fourth proportional to 821,630.40, 1,230,026.40 and 612,196.80 is: 916,492.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,630.40 : 1,230,026.40 = 612,196.80 : x
  2. Step 2: Convert to fraction form
    821,630.40/1,230,026.40 = 612,196.80/x
  3. Step 3: Cross multiply
    821,630.40x = 1,230,026.40 × 612,196.80
  4. Step 4: Simplify right side
    821,630.40x = 753,018,225,995.52
  5. Step 5: Solve for x
    x = 753,018,225,995.52/821,630.40
  6. Step 6: Final answer
    x = 916,492.65

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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.