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Finding the Fourth Proportional to 716,399.40, 988,610.76 and 389,702.10

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Solution

The fourth proportional to 716,399.40, 988,610.76 and 389,702.10 is: 537,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,399.40 : 988,610.76 = 389,702.10 : x
  2. Step 2: Convert to fraction form
    716,399.40/988,610.76 = 389,702.10/x
  3. Step 3: Cross multiply
    716,399.40x = 988,610.76 × 389,702.10
  4. Step 4: Simplify right side
    716,399.40x = 385,263,689,254.60
  5. Step 5: Solve for x
    x = 385,263,689,254.60/716,399.40
  6. Step 6: Final answer
    x = 537,777.79

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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.