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Finding the Fourth Proportional to 388,681.92, 581,706 and 239,017.08

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Solution

The fourth proportional to 388,681.92, 581,706 and 239,017.08 is: 357,715.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,681.92 : 581,706 = 239,017.08 : x
  2. Step 2: Convert to fraction form
    388,681.92/581,706 = 239,017.08/x
  3. Step 3: Cross multiply
    388,681.92x = 581,706 × 239,017.08
  4. Step 4: Simplify right side
    388,681.92x = 139,037,669,538.48
  5. Step 5: Solve for x
    x = 139,037,669,538.48/388,681.92
  6. Step 6: Final answer
    x = 357,715.81

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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.