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Finding the Fourth Proportional to 385,507.96, 532,281.63 and 309,445.46

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Solution

The fourth proportional to 385,507.96, 532,281.63 and 309,445.46 is: 427,260.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,507.96 : 532,281.63 = 309,445.46 : x
  2. Step 2: Convert to fraction form
    385,507.96/532,281.63 = 309,445.46/x
  3. Step 3: Cross multiply
    385,507.96x = 532,281.63 × 309,445.46
  4. Step 4: Simplify right side
    385,507.96x = 164,712,135,593.42
  5. Step 5: Solve for x
    x = 164,712,135,593.42/385,507.96
  6. Step 6: Final answer
    x = 427,260.01

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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.