Home / 1,020,780.16-1,531,170.22-421,756.83

Finding the Fourth Proportional to 1,020,780.16, 1,531,170.22 and 421,756.83

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Solution

The fourth proportional to 1,020,780.16, 1,531,170.22 and 421,756.83 is: 632,635.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020,780.16 : 1,531,170.22 = 421,756.83 : x
  2. Step 2: Convert to fraction form
    1,020,780.16/1,531,170.22 = 421,756.83/x
  3. Step 3: Cross multiply
    1,020,780.16x = 1,531,170.22 × 421,756.83
  4. Step 4: Simplify right side
    1,020,780.16x = 645,781,502,865.10
  5. Step 5: Solve for x
    x = 645,781,502,865.10/1,020,780.16
  6. Step 6: Final answer
    x = 632,635.24

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.