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Finding the Fourth Proportional to 389,491.34, 537,499.62 and 210,643.34

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Solution

The fourth proportional to 389,491.34, 537,499.62 and 210,643.34 is: 290,688.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,491.34 : 537,499.62 = 210,643.34 : x
  2. Step 2: Convert to fraction form
    389,491.34/537,499.62 = 210,643.34/x
  3. Step 3: Cross multiply
    389,491.34x = 537,499.62 × 210,643.34
  4. Step 4: Simplify right side
    389,491.34x = 113,220,712,518.03
  5. Step 5: Solve for x
    x = 113,220,712,518.03/389,491.34
  6. Step 6: Final answer
    x = 290,688.66

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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.