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Finding the Fourth Proportional to 355,663.81, 533,639.91 and 155,878.93

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Solution

The fourth proportional to 355,663.81, 533,639.91 and 155,878.93 is: 233,881.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,663.81 : 533,639.91 = 155,878.93 : x
  2. Step 2: Convert to fraction form
    355,663.81/533,639.91 = 155,878.93/x
  3. Step 3: Cross multiply
    355,663.81x = 533,639.91 × 155,878.93
  4. Step 4: Simplify right side
    355,663.81x = 83,183,218,176.10
  5. Step 5: Solve for x
    x = 83,183,218,176.10/355,663.81
  6. Step 6: Final answer
    x = 233,881.59

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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.