Home / 765,409.79-1,056,226.15-421,278.39

Finding the Fourth Proportional to 765,409.79, 1,056,226.15 and 421,278.39

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Solution

The fourth proportional to 765,409.79, 1,056,226.15 and 421,278.39 is: 581,342.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,409.79 : 1,056,226.15 = 421,278.39 : x
  2. Step 2: Convert to fraction form
    765,409.79/1,056,226.15 = 421,278.39/x
  3. Step 3: Cross multiply
    765,409.79x = 1,056,226.15 × 421,278.39
  4. Step 4: Simplify right side
    765,409.79x = 444,965,246,666.77
  5. Step 5: Solve for x
    x = 444,965,246,666.77/765,409.79
  6. Step 6: Final answer
    x = 581,342.51

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Double scale
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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.