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Finding the Fourth Proportional to 611,374.08, 915,399 and 358,281.48

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Solution

The fourth proportional to 611,374.08, 915,399 and 358,281.48 is: 536,448.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,374.08 : 915,399 = 358,281.48 : x
  2. Step 2: Convert to fraction form
    611,374.08/915,399 = 358,281.48/x
  3. Step 3: Cross multiply
    611,374.08x = 915,399 × 358,281.48
  4. Step 4: Simplify right side
    611,374.08x = 327,970,508,510.52
  5. Step 5: Solve for x
    x = 327,970,508,510.52/611,374.08
  6. Step 6: Final answer
    x = 536,448.17

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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.