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Finding the Fourth Proportional to 708,903.15, 978,298.88 and 386,625.03

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Solution

The fourth proportional to 708,903.15, 978,298.88 and 386,625.03 is: 533,549.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,903.15 : 978,298.88 = 386,625.03 : x
  2. Step 2: Convert to fraction form
    708,903.15/978,298.88 = 386,625.03/x
  3. Step 3: Cross multiply
    708,903.15x = 978,298.88 × 386,625.03
  4. Step 4: Simplify right side
    708,903.15x = 378,234,831,895.84
  5. Step 5: Solve for x
    x = 378,234,831,895.84/708,903.15
  6. Step 6: Final answer
    x = 533,549.37

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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.