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Finding the Fourth Proportional to 531,117.80, 732,942.64 and 289,400.44

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Solution

The fourth proportional to 531,117.80, 732,942.64 and 289,400.44 is: 399,372.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,117.80 : 732,942.64 = 289,400.44 : x
  2. Step 2: Convert to fraction form
    531,117.80/732,942.64 = 289,400.44/x
  3. Step 3: Cross multiply
    531,117.80x = 732,942.64 × 289,400.44
  4. Step 4: Simplify right side
    531,117.80x = 212,113,918,846.05
  5. Step 5: Solve for x
    x = 212,113,918,846.05/531,117.80
  6. Step 6: Final answer
    x = 399,372.64

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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.