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Finding the Fourth Proportional to 612,505.20, 917,008.20 and 549,519.60

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Solution

The fourth proportional to 612,505.20, 917,008.20 and 549,519.60 is: 822,709.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,505.20 : 917,008.20 = 549,519.60 : x
  2. Step 2: Convert to fraction form
    612,505.20/917,008.20 = 549,519.60/x
  3. Step 3: Cross multiply
    612,505.20x = 917,008.20 × 549,519.60
  4. Step 4: Simplify right side
    612,505.20x = 503,913,979,260.72
  5. Step 5: Solve for x
    x = 503,913,979,260.72/612,505.20
  6. Step 6: Final answer
    x = 822,709.72

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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.