Home / 688,720.40-1,031,039.40-512,010.80

Finding the Fourth Proportional to 688,720.40, 1,031,039.40 and 512,010.80

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Solution

The fourth proportional to 688,720.40, 1,031,039.40 and 512,010.80 is: 766,498.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,720.40 : 1,031,039.40 = 512,010.80 : x
  2. Step 2: Convert to fraction form
    688,720.40/1,031,039.40 = 512,010.80/x
  3. Step 3: Cross multiply
    688,720.40x = 1,031,039.40 × 512,010.80
  4. Step 4: Simplify right side
    688,720.40x = 527,903,308,025.52
  5. Step 5: Solve for x
    x = 527,903,308,025.52/688,720.40
  6. Step 6: Final answer
    x = 766,498.72

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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.