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Finding the Fourth Proportional to 553,689.31, 830,603.23 and 216,686.43

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Solution

The fourth proportional to 553,689.31, 830,603.23 and 216,686.43 is: 325,056.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,689.31 : 830,603.23 = 216,686.43 : x
  2. Step 2: Convert to fraction form
    553,689.31/830,603.23 = 216,686.43/x
  3. Step 3: Cross multiply
    553,689.31x = 830,603.23 × 216,686.43
  4. Step 4: Simplify right side
    553,689.31x = 179,980,448,655.17
  5. Step 5: Solve for x
    x = 179,980,448,655.17/553,689.31
  6. Step 6: Final answer
    x = 325,056.75

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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.