Home / 774,151.38-1,161,388.58-390,116.07

Finding the Fourth Proportional to 774,151.38, 1,161,388.58 and 390,116.07

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Solution

The fourth proportional to 774,151.38, 1,161,388.58 and 390,116.07 is: 585,255.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    774,151.38 : 1,161,388.58 = 390,116.07 : x
  2. Step 2: Convert to fraction form
    774,151.38/1,161,388.58 = 390,116.07/x
  3. Step 3: Cross multiply
    774,151.38x = 1,161,388.58 × 390,116.07
  4. Step 4: Simplify right side
    774,151.38x = 453,076,346,621.90
  5. Step 5: Solve for x
    x = 453,076,346,621.90/774,151.38
  6. Step 6: Final answer
    x = 585,255.49

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Double scale
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Similar ratio
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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.