Home / 910,121.75-1,256,217.79-528,271.55

Finding the Fourth Proportional to 910,121.75, 1,256,217.79 and 528,271.55

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Solution

The fourth proportional to 910,121.75, 1,256,217.79 and 528,271.55 is: 729,159.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    910,121.75 : 1,256,217.79 = 528,271.55 : x
  2. Step 2: Convert to fraction form
    910,121.75/1,256,217.79 = 528,271.55/x
  3. Step 3: Cross multiply
    910,121.75x = 1,256,217.79 × 528,271.55
  4. Step 4: Simplify right side
    910,121.75x = 663,624,112,779.79
  5. Step 5: Solve for x
    x = 663,624,112,779.79/910,121.75
  6. Step 6: Final answer
    x = 729,159.72

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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.