Home / 991,000.71-1,486,722.50-317,122.45

Finding the Fourth Proportional to 991,000.71, 1,486,722.50 and 317,122.45

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Solution

The fourth proportional to 991,000.71, 1,486,722.50 and 317,122.45 is: 475,754.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,000.71 : 1,486,722.50 = 317,122.45 : x
  2. Step 2: Convert to fraction form
    991,000.71/1,486,722.50 = 317,122.45/x
  3. Step 3: Cross multiply
    991,000.71x = 1,486,722.50 × 317,122.45
  4. Step 4: Simplify right side
    991,000.71x = 471,473,081,738.32
  5. Step 5: Solve for x
    x = 471,473,081,738.32/991,000.71
  6. Step 6: Final answer
    x = 475,754.53

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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.