Home / 780,865.65-1,077,376.08-490,508.58

Finding the Fourth Proportional to 780,865.65, 1,077,376.08 and 490,508.58

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Solution

The fourth proportional to 780,865.65, 1,077,376.08 and 490,508.58 is: 676,764.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,865.65 : 1,077,376.08 = 490,508.58 : x
  2. Step 2: Convert to fraction form
    780,865.65/1,077,376.08 = 490,508.58/x
  3. Step 3: Cross multiply
    780,865.65x = 1,077,376.08 × 490,508.58
  4. Step 4: Simplify right side
    780,865.65x = 528,462,211,126.77
  5. Step 5: Solve for x
    x = 528,462,211,126.77/780,865.65
  6. Step 6: Final answer
    x = 676,764.58

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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.