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Finding the Fourth Proportional to 611.07, 916.91 and 530.48

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Solution

The fourth proportional to 611.07, 916.91 and 530.48 is: 795.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.07 : 916.91 = 530.48 : x
  2. Step 2: Convert to fraction form
    611.07/916.91 = 530.48/x
  3. Step 3: Cross multiply
    611.07x = 916.91 × 530.48
  4. Step 4: Simplify right side
    611.07x = 486,402.42
  5. Step 5: Solve for x
    x = 486,402.42/611.07
  6. Step 6: Final answer
    x = 795.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.