Home / 689,071.60-1,031,639.10-618,212.80

Finding the Fourth Proportional to 689,071.60, 1,031,639.10 and 618,212.80

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Solution

The fourth proportional to 689,071.60, 1,031,639.10 and 618,212.80 is: 925,553.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,071.60 : 1,031,639.10 = 618,212.80 : x
  2. Step 2: Convert to fraction form
    689,071.60/1,031,639.10 = 618,212.80/x
  3. Step 3: Cross multiply
    689,071.60x = 1,031,639.10 × 618,212.80
  4. Step 4: Simplify right side
    689,071.60x = 637,772,496,600.48
  5. Step 5: Solve for x
    x = 637,772,496,600.48/689,071.60
  6. Step 6: Final answer
    x = 925,553.30

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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.