Home / 670,246.80-1,005,370.20-390,310.80

Finding the Fourth Proportional to 670,246.80, 1,005,370.20 and 390,310.80

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Solution

The fourth proportional to 670,246.80, 1,005,370.20 and 390,310.80 is: 585,466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,246.80 : 1,005,370.20 = 390,310.80 : x
  2. Step 2: Convert to fraction form
    670,246.80/1,005,370.20 = 390,310.80/x
  3. Step 3: Cross multiply
    670,246.80x = 1,005,370.20 × 390,310.80
  4. Step 4: Simplify right side
    670,246.80x = 392,406,847,058.16
  5. Step 5: Solve for x
    x = 392,406,847,058.16/670,246.80
  6. Step 6: Final answer
    x = 585,466.20

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Double scale
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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.