Home / 918,990.35-1,268,184.66-499,875.49

Finding the Fourth Proportional to 918,990.35, 1,268,184.66 and 499,875.49

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Solution

The fourth proportional to 918,990.35, 1,268,184.66 and 499,875.49 is: 689,816.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,990.35 : 1,268,184.66 = 499,875.49 : x
  2. Step 2: Convert to fraction form
    918,990.35/1,268,184.66 = 499,875.49/x
  3. Step 3: Cross multiply
    918,990.35x = 1,268,184.66 × 499,875.49
  4. Step 4: Simplify right side
    918,990.35x = 633,934,428,327.98
  5. Step 5: Solve for x
    x = 633,934,428,327.98/918,990.35
  6. Step 6: Final answer
    x = 689,816.20

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Double scale
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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.