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Finding the Fourth Proportional to 611,712.64, 917,578.19 and 212,366.10

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Solution

The fourth proportional to 611,712.64, 917,578.19 and 212,366.10 is: 318,552.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,712.64 : 917,578.19 = 212,366.10 : x
  2. Step 2: Convert to fraction form
    611,712.64/917,578.19 = 212,366.10/x
  3. Step 3: Cross multiply
    611,712.64x = 917,578.19 × 212,366.10
  4. Step 4: Simplify right side
    611,712.64x = 194,862,501,655.36
  5. Step 5: Solve for x
    x = 194,862,501,655.36/611,712.64
  6. Step 6: Final answer
    x = 318,552.35

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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.