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Finding the Fourth Proportional to 556,720.80, 835,340.40 and 290,781.60

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Solution

The fourth proportional to 556,720.80, 835,340.40 and 290,781.60 is: 436,307.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,720.80 : 835,340.40 = 290,781.60 : x
  2. Step 2: Convert to fraction form
    556,720.80/835,340.40 = 290,781.60/x
  3. Step 3: Cross multiply
    556,720.80x = 835,340.40 × 290,781.60
  4. Step 4: Simplify right side
    556,720.80x = 242,901,618,056.64
  5. Step 5: Solve for x
    x = 242,901,618,056.64/556,720.80
  6. Step 6: Final answer
    x = 436,307.78

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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.