Home / 818,547.20-1,227,820.80-345,766.40

Finding the Fourth Proportional to 818,547.20, 1,227,820.80 and 345,766.40

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Solution

The fourth proportional to 818,547.20, 1,227,820.80 and 345,766.40 is: 518,649.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,547.20 : 1,227,820.80 = 345,766.40 : x
  2. Step 2: Convert to fraction form
    818,547.20/1,227,820.80 = 345,766.40/x
  3. Step 3: Cross multiply
    818,547.20x = 1,227,820.80 × 345,766.40
  4. Step 4: Simplify right side
    818,547.20x = 424,539,177,861.12
  5. Step 5: Solve for x
    x = 424,539,177,861.12/818,547.20
  6. Step 6: Final answer
    x = 518,649.60

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Double scale
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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.