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Finding the Fourth Proportional to 724,237.90, 999,401.70 and 401,948.20

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Solution

The fourth proportional to 724,237.90, 999,401.70 and 401,948.20 is: 554,662.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,237.90 : 999,401.70 = 401,948.20 : x
  2. Step 2: Convert to fraction form
    724,237.90/999,401.70 = 401,948.20/x
  3. Step 3: Cross multiply
    724,237.90x = 999,401.70 × 401,948.20
  4. Step 4: Simplify right side
    724,237.90x = 401,707,714,391.94
  5. Step 5: Solve for x
    x = 401,707,714,391.94/724,237.90
  6. Step 6: Final answer
    x = 554,662.65

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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.