Home / 920,581.80-1,270,312.11-512,721.72

Finding the Fourth Proportional to 920,581.80, 1,270,312.11 and 512,721.72

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Solution

The fourth proportional to 920,581.80, 1,270,312.11 and 512,721.72 is: 707,505.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,581.80 : 1,270,312.11 = 512,721.72 : x
  2. Step 2: Convert to fraction form
    920,581.80/1,270,312.11 = 512,721.72/x
  3. Step 3: Cross multiply
    920,581.80x = 1,270,312.11 × 512,721.72
  4. Step 4: Simplify right side
    920,581.80x = 651,316,609,976.03
  5. Step 5: Solve for x
    x = 651,316,609,976.03/920,581.80
  6. Step 6: Final answer
    x = 707,505.42

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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.