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Finding the Fourth Proportional to 434,510.80, 651,247.80 and 389,928.40

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Solution

The fourth proportional to 434,510.80, 651,247.80 and 389,928.40 is: 584,427.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,510.80 : 651,247.80 = 389,928.40 : x
  2. Step 2: Convert to fraction form
    434,510.80/651,247.80 = 389,928.40/x
  3. Step 3: Cross multiply
    434,510.80x = 651,247.80 × 389,928.40
  4. Step 4: Simplify right side
    434,510.80x = 253,940,012,657.52
  5. Step 5: Solve for x
    x = 253,940,012,657.52/434,510.80
  6. Step 6: Final answer
    x = 584,427.39

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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.