Home / 459,211.54-688,488.12-215,916.45

Finding the Fourth Proportional to 459,211.54, 688,488.12 and 215,916.45

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Solution

The fourth proportional to 459,211.54, 688,488.12 and 215,916.45 is: 323,719.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,211.54 : 688,488.12 = 215,916.45 : x
  2. Step 2: Convert to fraction form
    459,211.54/688,488.12 = 215,916.45/x
  3. Step 3: Cross multiply
    459,211.54x = 688,488.12 × 215,916.45
  4. Step 4: Simplify right side
    459,211.54x = 148,655,910,737.57
  5. Step 5: Solve for x
    x = 148,655,910,737.57/459,211.54
  6. Step 6: Final answer
    x = 323,719.89

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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.