Home / 921,518.98-1,271,702.13-513,646.72

Finding the Fourth Proportional to 921,518.98, 1,271,702.13 and 513,646.72

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Solution

The fourth proportional to 921,518.98, 1,271,702.13 and 513,646.72 is: 708,835.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,518.98 : 1,271,702.13 = 513,646.72 : x
  2. Step 2: Convert to fraction form
    921,518.98/1,271,702.13 = 513,646.72/x
  3. Step 3: Cross multiply
    921,518.98x = 1,271,702.13 × 513,646.72
  4. Step 4: Simplify right side
    921,518.98x = 653,205,622,786.08
  5. Step 5: Solve for x
    x = 653,205,622,786.08/921,518.98
  6. Step 6: Final answer
    x = 708,835.78

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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.