Home / 688,719.40-1,031,037.90-512,009.80

Finding the Fourth Proportional to 688,719.40, 1,031,037.90 and 512,009.80

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Solution

The fourth proportional to 688,719.40, 1,031,037.90 and 512,009.80 is: 766,497.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,719.40 : 1,031,037.90 = 512,009.80 : x
  2. Step 2: Convert to fraction form
    688,719.40/1,031,037.90 = 512,009.80/x
  3. Step 3: Cross multiply
    688,719.40x = 1,031,037.90 × 512,009.80
  4. Step 4: Simplify right side
    688,719.40x = 527,901,508,971.42
  5. Step 5: Solve for x
    x = 527,901,508,971.42/688,719.40
  6. Step 6: Final answer
    x = 766,497.23

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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.