Home / 670,256.40-1,005,384.60-386,821.20

Finding the Fourth Proportional to 670,256.40, 1,005,384.60 and 386,821.20

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Solution

The fourth proportional to 670,256.40, 1,005,384.60 and 386,821.20 is: 580,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,256.40 : 1,005,384.60 = 386,821.20 : x
  2. Step 2: Convert to fraction form
    670,256.40/1,005,384.60 = 386,821.20/x
  3. Step 3: Cross multiply
    670,256.40x = 1,005,384.60 × 386,821.20
  4. Step 4: Simplify right side
    670,256.40x = 388,904,077,433.52
  5. Step 5: Solve for x
    x = 388,904,077,433.52/670,256.40
  6. Step 6: Final answer
    x = 580,231.80

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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.