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Finding the Fourth Proportional to 531,090.21, 732,895.25 and 289,374.77

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Solution

The fourth proportional to 531,090.21, 732,895.25 and 289,374.77 is: 399,332.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,090.21 : 732,895.25 = 289,374.77 : x
  2. Step 2: Convert to fraction form
    531,090.21/732,895.25 = 289,374.77/x
  3. Step 3: Cross multiply
    531,090.21x = 732,895.25 × 289,374.77
  4. Step 4: Simplify right side
    531,090.21x = 212,081,392,039.85
  5. Step 5: Solve for x
    x = 212,081,392,039.85/531,090.21
  6. Step 6: Final answer
    x = 399,332.14

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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.