Home / 900,979.20-1,243,353.60-498,585.60

Finding the Fourth Proportional to 900,979.20, 1,243,353.60 and 498,585.60

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Solution

The fourth proportional to 900,979.20, 1,243,353.60 and 498,585.60 is: 688,049.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,979.20 : 1,243,353.60 = 498,585.60 : x
  2. Step 2: Convert to fraction form
    900,979.20/1,243,353.60 = 498,585.60/x
  3. Step 3: Cross multiply
    900,979.20x = 1,243,353.60 × 498,585.60
  4. Step 4: Simplify right side
    900,979.20x = 619,918,200,668.16
  5. Step 5: Solve for x
    x = 619,918,200,668.16/900,979.20
  6. Step 6: Final answer
    x = 688,049.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.