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Finding the Fourth Proportional to 642,903.71, 964,355.50 and 216,403.74

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Solution

The fourth proportional to 642,903.71, 964,355.50 and 216,403.74 is: 324,605.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,903.71 : 964,355.50 = 216,403.74 : x
  2. Step 2: Convert to fraction form
    642,903.71/964,355.50 = 216,403.74/x
  3. Step 3: Cross multiply
    642,903.71x = 964,355.50 × 216,403.74
  4. Step 4: Simplify right side
    642,903.71x = 208,690,136,889.57
  5. Step 5: Solve for x
    x = 208,690,136,889.57/642,903.71
  6. Step 6: Final answer
    x = 324,605.59

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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.