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Finding the Fourth Proportional to 389,710.40, 537,746.40 and 217,607.36

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Solution

The fourth proportional to 389,710.40, 537,746.40 and 217,607.36 is: 300,268.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,710.40 : 537,746.40 = 217,607.36 : x
  2. Step 2: Convert to fraction form
    389,710.40/537,746.40 = 217,607.36/x
  3. Step 3: Cross multiply
    389,710.40x = 537,746.40 × 217,607.36
  4. Step 4: Simplify right side
    389,710.40x = 117,017,574,453.50
  5. Step 5: Solve for x
    x = 117,017,574,453.50/389,710.40
  6. Step 6: Final answer
    x = 300,268.03

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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.