Home / 563,979.32-778,341.36-309,380.12

Finding the Fourth Proportional to 563,979.32, 778,341.36 and 309,380.12

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Solution

The fourth proportional to 563,979.32, 778,341.36 and 309,380.12 is: 426,971.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,979.32 : 778,341.36 = 309,380.12 : x
  2. Step 2: Convert to fraction form
    563,979.32/778,341.36 = 309,380.12/x
  3. Step 3: Cross multiply
    563,979.32x = 778,341.36 × 309,380.12
  4. Step 4: Simplify right side
    563,979.32x = 240,803,343,357.76
  5. Step 5: Solve for x
    x = 240,803,343,357.76/563,979.32
  6. Step 6: Final answer
    x = 426,971.94

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.