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Finding the Fourth Proportional to 649,672.40, 975,430.20 and 400,840.40

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Solution

The fourth proportional to 649,672.40, 975,430.20 and 400,840.40 is: 601,829.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,672.40 : 975,430.20 = 400,840.40 : x
  2. Step 2: Convert to fraction form
    649,672.40/975,430.20 = 400,840.40/x
  3. Step 3: Cross multiply
    649,672.40x = 975,430.20 × 400,840.40
  4. Step 4: Simplify right side
    649,672.40x = 390,991,831,540.08
  5. Step 5: Solve for x
    x = 390,991,831,540.08/649,672.40
  6. Step 6: Final answer
    x = 601,829.22

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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.