Home / 921,005.46-1,271,026.77-513,107.10

Finding the Fourth Proportional to 921,005.46, 1,271,026.77 and 513,107.10

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Solution

The fourth proportional to 921,005.46, 1,271,026.77 and 513,107.10 is: 708,109.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,005.46 : 1,271,026.77 = 513,107.10 : x
  2. Step 2: Convert to fraction form
    921,005.46/1,271,026.77 = 513,107.10/x
  3. Step 3: Cross multiply
    921,005.46x = 1,271,026.77 × 513,107.10
  4. Step 4: Simplify right side
    921,005.46x = 652,172,859,977.07
  5. Step 5: Solve for x
    x = 652,172,859,977.07/921,005.46
  6. Step 6: Final answer
    x = 708,109.66

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Double scale
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Similar ratio
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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.