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Finding the Fourth Proportional to 563,637.78, 777,820.08 and 308,990.76

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Solution

The fourth proportional to 563,637.78, 777,820.08 and 308,990.76 is: 426,407.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,637.78 : 777,820.08 = 308,990.76 : x
  2. Step 2: Convert to fraction form
    563,637.78/777,820.08 = 308,990.76/x
  3. Step 3: Cross multiply
    563,637.78x = 777,820.08 × 308,990.76
  4. Step 4: Simplify right side
    563,637.78x = 240,339,217,662.46
  5. Step 5: Solve for x
    x = 240,339,217,662.46/563,637.78
  6. Step 6: Final answer
    x = 426,407.22

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Half scale
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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.