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Finding the Fourth Proportional to 290,510.19, 435,781.68 and 103,521.69

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Solution

The fourth proportional to 290,510.19, 435,781.68 and 103,521.69 is: 155,288.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,510.19 : 435,781.68 = 103,521.69 : x
  2. Step 2: Convert to fraction form
    290,510.19/435,781.68 = 103,521.69/x
  3. Step 3: Cross multiply
    290,510.19x = 435,781.68 × 103,521.69
  4. Step 4: Simplify right side
    290,510.19x = 45,112,855,984.64
  5. Step 5: Solve for x
    x = 45,112,855,984.64/290,510.19
  6. Step 6: Final answer
    x = 155,288.38

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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.