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Finding the Fourth Proportional to 900.05, 1,242.02 and 501.69

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Solution

The fourth proportional to 900.05, 1,242.02 and 501.69 is: 692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.05 : 1,242.02 = 501.69 : x
  2. Step 2: Convert to fraction form
    900.05/1,242.02 = 501.69/x
  3. Step 3: Cross multiply
    900.05x = 1,242.02 × 501.69
  4. Step 4: Simplify right side
    900.05x = 623,109.01
  5. Step 5: Solve for x
    x = 623,109.01/900.05
  6. Step 6: Final answer
    x = 692.30

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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.