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Finding the Fourth Proportional to 611,871.35, 917,712.23 and 312,573.11

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Solution

The fourth proportional to 611,871.35, 917,712.23 and 312,573.11 is: 468,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,871.35 : 917,712.23 = 312,573.11 : x
  2. Step 2: Convert to fraction form
    611,871.35/917,712.23 = 312,573.11/x
  3. Step 3: Cross multiply
    611,871.35x = 917,712.23 × 312,573.11
  4. Step 4: Simplify right side
    611,871.35x = 286,852,159,664.71
  5. Step 5: Solve for x
    x = 286,852,159,664.71/611,871.35
  6. Step 6: Final answer
    x = 468,811.23

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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.