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Finding the Fourth Proportional to 648,319.80, 971,313.30 and 555,007.80

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Solution

The fourth proportional to 648,319.80, 971,313.30 and 555,007.80 is: 831,513.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,319.80 : 971,313.30 = 555,007.80 : x
  2. Step 2: Convert to fraction form
    648,319.80/971,313.30 = 555,007.80/x
  3. Step 3: Cross multiply
    648,319.80x = 971,313.30 × 555,007.80
  4. Step 4: Simplify right side
    648,319.80x = 539,086,457,743.74
  5. Step 5: Solve for x
    x = 539,086,457,743.74/648,319.80
  6. Step 6: Final answer
    x = 831,513.18

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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.