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Finding the Fourth Proportional to 688.40, 950.35 and 530.69

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Solution

The fourth proportional to 688.40, 950.35 and 530.69 is: 732.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.40 : 950.35 = 530.69 : x
  2. Step 2: Convert to fraction form
    688.40/950.35 = 530.69/x
  3. Step 3: Cross multiply
    688.40x = 950.35 × 530.69
  4. Step 4: Simplify right side
    688.40x = 504,341.24
  5. Step 5: Solve for x
    x = 504,341.24/688.40
  6. Step 6: Final answer
    x = 732.63

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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.