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Finding the Fourth Proportional to 645,487.65, 890,710.63 and 373,501.40

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Solution

The fourth proportional to 645,487.65, 890,710.63 and 373,501.40 is: 515,395.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,487.65 : 890,710.63 = 373,501.40 : x
  2. Step 2: Convert to fraction form
    645,487.65/890,710.63 = 373,501.40/x
  3. Step 3: Cross multiply
    645,487.65x = 890,710.63 × 373,501.40
  4. Step 4: Simplify right side
    645,487.65x = 332,681,661,912.58
  5. Step 5: Solve for x
    x = 332,681,661,912.58/645,487.65
  6. Step 6: Final answer
    x = 515,395.86

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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.