Home / 690,903.40-1,036,355.10-490,136.80

Finding the Fourth Proportional to 690,903.40, 1,036,355.10 and 490,136.80

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Solution

The fourth proportional to 690,903.40, 1,036,355.10 and 490,136.80 is: 735,205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,903.40 : 1,036,355.10 = 490,136.80 : x
  2. Step 2: Convert to fraction form
    690,903.40/1,036,355.10 = 490,136.80/x
  3. Step 3: Cross multiply
    690,903.40x = 1,036,355.10 × 490,136.80
  4. Step 4: Simplify right side
    690,903.40x = 507,955,772,377.68
  5. Step 5: Solve for x
    x = 507,955,772,377.68/690,903.40
  6. Step 6: Final answer
    x = 735,205.20

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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.