Home / 670,286.80-1,005,430.20-390,350.80

Finding the Fourth Proportional to 670,286.80, 1,005,430.20 and 390,350.80

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Solution

The fourth proportional to 670,286.80, 1,005,430.20 and 390,350.80 is: 585,526.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,286.80 : 1,005,430.20 = 390,350.80 : x
  2. Step 2: Convert to fraction form
    670,286.80/1,005,430.20 = 390,350.80/x
  3. Step 3: Cross multiply
    670,286.80x = 1,005,430.20 × 390,350.80
  4. Step 4: Simplify right side
    670,286.80x = 392,470,482,914.16
  5. Step 5: Solve for x
    x = 392,470,482,914.16/670,286.80
  6. Step 6: Final answer
    x = 585,526.20

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Similar ratio
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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.