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Finding the Fourth Proportional to 875,782.61, 1,208,552.60 and 513,447.80

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Solution

The fourth proportional to 875,782.61, 1,208,552.60 and 513,447.80 is: 708,541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,782.61 : 1,208,552.60 = 513,447.80 : x
  2. Step 2: Convert to fraction form
    875,782.61/1,208,552.60 = 513,447.80/x
  3. Step 3: Cross multiply
    875,782.61x = 1,208,552.60 × 513,447.80
  4. Step 4: Simplify right side
    875,782.61x = 620,528,673,993.72
  5. Step 5: Solve for x
    x = 620,528,673,993.72/875,782.61
  6. Step 6: Final answer
    x = 708,541.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.