Home / 989,385.40-1,482,984.60-390,147.40

Finding the Fourth Proportional to 989,385.40, 1,482,984.60 and 390,147.40

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Solution

The fourth proportional to 989,385.40, 1,482,984.60 and 390,147.40 is: 584,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,385.40 : 1,482,984.60 = 390,147.40 : x
  2. Step 2: Convert to fraction form
    989,385.40/1,482,984.60 = 390,147.40/x
  3. Step 3: Cross multiply
    989,385.40x = 1,482,984.60 × 390,147.40
  4. Step 4: Simplify right side
    989,385.40x = 578,582,585,930.04
  5. Step 5: Solve for x
    x = 578,582,585,930.04/989,385.40
  6. Step 6: Final answer
    x = 584,789.90

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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.