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Finding the Fourth Proportional to 613,557.55, 920,378.39 and 208,585

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Solution

The fourth proportional to 613,557.55, 920,378.39 and 208,585 is: 312,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,557.55 : 920,378.39 = 208,585 : x
  2. Step 2: Convert to fraction form
    613,557.55/920,378.39 = 208,585/x
  3. Step 3: Cross multiply
    613,557.55x = 920,378.39 × 208,585
  4. Step 4: Simplify right side
    613,557.55x = 191,977,126,478.15
  5. Step 5: Solve for x
    x = 191,977,126,478.15/613,557.55
  6. Step 6: Final answer
    x = 312,891.80

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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.