Home / 743,824.32-1,026,570.64-421,638.72

Finding the Fourth Proportional to 743,824.32, 1,026,570.64 and 421,638.72

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Solution

The fourth proportional to 743,824.32, 1,026,570.64 and 421,638.72 is: 581,914.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,824.32 : 1,026,570.64 = 421,638.72 : x
  2. Step 2: Convert to fraction form
    743,824.32/1,026,570.64 = 421,638.72/x
  3. Step 3: Cross multiply
    743,824.32x = 1,026,570.64 × 421,638.72
  4. Step 4: Simplify right side
    743,824.32x = 432,841,930,639.18
  5. Step 5: Solve for x
    x = 432,841,930,639.18/743,824.32
  6. Step 6: Final answer
    x = 581,914.20

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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.