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Finding the Fourth Proportional to 675,237.47, 931,724.20 and 388,702.19

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Solution

The fourth proportional to 675,237.47, 931,724.20 and 388,702.19 is: 536,349.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,237.47 : 931,724.20 = 388,702.19 : x
  2. Step 2: Convert to fraction form
    675,237.47/931,724.20 = 388,702.19/x
  3. Step 3: Cross multiply
    675,237.47x = 931,724.20 × 388,702.19
  4. Step 4: Simplify right side
    675,237.47x = 362,163,237,016.00
  5. Step 5: Solve for x
    x = 362,163,237,016.00/675,237.47
  6. Step 6: Final answer
    x = 536,349.44

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.