Home / 746,009.60-1,119,345.12-390,939.20

Finding the Fourth Proportional to 746,009.60, 1,119,345.12 and 390,939.20

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Solution

The fourth proportional to 746,009.60, 1,119,345.12 and 390,939.20 is: 586,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    746,009.60 : 1,119,345.12 = 390,939.20 : x
  2. Step 2: Convert to fraction form
    746,009.60/1,119,345.12 = 390,939.20/x
  3. Step 3: Cross multiply
    746,009.60x = 1,119,345.12 × 390,939.20
  4. Step 4: Simplify right side
    746,009.60x = 437,595,885,736.70
  5. Step 5: Solve for x
    x = 437,595,885,736.70/746,009.60
  6. Step 6: Final answer
    x = 586,582.11

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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.