Home / 765,520.17-1,056,409.51-421,348.74

Finding the Fourth Proportional to 765,520.17, 1,056,409.51 and 421,348.74

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Solution

The fourth proportional to 765,520.17, 1,056,409.51 and 421,348.74 is: 581,456.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,520.17 : 1,056,409.51 = 421,348.74 : x
  2. Step 2: Convert to fraction form
    765,520.17/1,056,409.51 = 421,348.74/x
  3. Step 3: Cross multiply
    765,520.17x = 1,056,409.51 × 421,348.74
  4. Step 4: Simplify right side
    765,520.17x = 445,116,811,737.64
  5. Step 5: Solve for x
    x = 445,116,811,737.64/765,520.17
  6. Step 6: Final answer
    x = 581,456.68

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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.