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Finding the Fourth Proportional to 553,689.81, 830,603.97 and 216,686.93

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Solution

The fourth proportional to 553,689.81, 830,603.97 and 216,686.93 is: 325,057.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,689.81 : 830,603.97 = 216,686.93 : x
  2. Step 2: Convert to fraction form
    553,689.81/830,603.97 = 216,686.93/x
  3. Step 3: Cross multiply
    553,689.81x = 830,603.97 × 216,686.93
  4. Step 4: Simplify right side
    553,689.81x = 179,981,024,305.11
  5. Step 5: Solve for x
    x = 179,981,024,305.11/553,689.81
  6. Step 6: Final answer
    x = 325,057.50

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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.