Home / 920,985.59-1,270,999.35-513,087.21

Finding the Fourth Proportional to 920,985.59, 1,270,999.35 and 513,087.21

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Solution

The fourth proportional to 920,985.59, 1,270,999.35 and 513,087.21 is: 708,082.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,985.59 : 1,270,999.35 = 513,087.21 : x
  2. Step 2: Convert to fraction form
    920,985.59/1,270,999.35 = 513,087.21/x
  3. Step 3: Cross multiply
    920,985.59x = 1,270,999.35 × 513,087.21
  4. Step 4: Simplify right side
    920,985.59x = 652,133,510,403.31
  5. Step 5: Solve for x
    x = 652,133,510,403.31/920,985.59
  6. Step 6: Final answer
    x = 708,082.21

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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.