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Finding the Fourth Proportional to 708,953.81, 978,181.22 and 418,572.15

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Solution

The fourth proportional to 708,953.81, 978,181.22 and 418,572.15 is: 577,526.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,953.81 : 978,181.22 = 418,572.15 : x
  2. Step 2: Convert to fraction form
    708,953.81/978,181.22 = 418,572.15/x
  3. Step 3: Cross multiply
    708,953.81x = 978,181.22 × 418,572.15
  4. Step 4: Simplify right side
    708,953.81x = 409,439,417,391.45
  5. Step 5: Solve for x
    x = 409,439,417,391.45/708,953.81
  6. Step 6: Final answer
    x = 577,526.23

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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.