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Finding the Fourth Proportional to 645,903.71, 891,289.19 and 373,989.96

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Solution

The fourth proportional to 645,903.71, 891,289.19 and 373,989.96 is: 516,072.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,903.71 : 891,289.19 = 373,989.96 : x
  2. Step 2: Convert to fraction form
    645,903.71/891,289.19 = 373,989.96/x
  3. Step 3: Cross multiply
    645,903.71x = 891,289.19 × 373,989.96
  4. Step 4: Simplify right side
    645,903.71x = 333,333,208,516.53
  5. Step 5: Solve for x
    x = 333,333,208,516.53/645,903.71
  6. Step 6: Final answer
    x = 516,072.60

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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.