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Finding the Fourth Proportional to 563,685.44, 777,885.72 and 309,031.16

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Solution

The fourth proportional to 563,685.44, 777,885.72 and 309,031.16 is: 426,462.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,685.44 : 777,885.72 = 309,031.16 : x
  2. Step 2: Convert to fraction form
    563,685.44/777,885.72 = 309,031.16/x
  3. Step 3: Cross multiply
    563,685.44x = 777,885.72 × 309,031.16
  4. Step 4: Simplify right side
    563,685.44x = 240,390,926,399.04
  5. Step 5: Solve for x
    x = 240,390,926,399.04/563,685.44
  6. Step 6: Final answer
    x = 426,462.90

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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.