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Finding the Fourth Proportional to 724,278.83, 999,628.47 and 418,300.21

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Solution

The fourth proportional to 724,278.83, 999,628.47 and 418,300.21 is: 577,325.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,278.83 : 999,628.47 = 418,300.21 : x
  2. Step 2: Convert to fraction form
    724,278.83/999,628.47 = 418,300.21/x
  3. Step 3: Cross multiply
    724,278.83x = 999,628.47 × 418,300.21
  4. Step 4: Simplify right side
    724,278.83x = 418,144,800,172.51
  5. Step 5: Solve for x
    x = 418,144,800,172.51/724,278.83
  6. Step 6: Final answer
    x = 577,325.73

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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.