Home / 870,868.70-1,306,385.50-338,430.78

Finding the Fourth Proportional to 870,868.70, 1,306,385.50 and 338,430.78

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Solution

The fourth proportional to 870,868.70, 1,306,385.50 and 338,430.78 is: 507,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,868.70 : 1,306,385.50 = 338,430.78 : x
  2. Step 2: Convert to fraction form
    870,868.70/1,306,385.50 = 338,430.78/x
  3. Step 3: Cross multiply
    870,868.70x = 1,306,385.50 × 338,430.78
  4. Step 4: Simplify right side
    870,868.70x = 442,121,063,745.69
  5. Step 5: Solve for x
    x = 442,121,063,745.69/870,868.70
  6. Step 6: Final answer
    x = 507,678.21

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1.5x scale

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.