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Finding the Fourth Proportional to 617,315.39, 926,139.47 and 257,366.60

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Solution

The fourth proportional to 617,315.39, 926,139.47 and 257,366.60 is: 386,119.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,315.39 : 926,139.47 = 257,366.60 : x
  2. Step 2: Convert to fraction form
    617,315.39/926,139.47 = 257,366.60/x
  3. Step 3: Cross multiply
    617,315.39x = 926,139.47 × 257,366.60
  4. Step 4: Simplify right side
    617,315.39x = 238,357,360,602.17
  5. Step 5: Solve for x
    x = 238,357,360,602.17/617,315.39
  6. Step 6: Final answer
    x = 386,119.26

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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.