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Finding the Fourth Proportional to 611,223.46, 917,438.58 and 458,890.71

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Solution

The fourth proportional to 611,223.46, 917,438.58 and 458,890.71 is: 688,789.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,223.46 : 917,438.58 = 458,890.71 : x
  2. Step 2: Convert to fraction form
    611,223.46/917,438.58 = 458,890.71/x
  3. Step 3: Cross multiply
    611,223.46x = 917,438.58 × 458,890.71
  4. Step 4: Simplify right side
    611,223.46x = 421,004,041,357.59
  5. Step 5: Solve for x
    x = 421,004,041,357.59/611,223.46
  6. Step 6: Final answer
    x = 688,789.07

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1.5x scale

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.