Home / 712,938.40-1,069,407.60-665,699.20

Finding the Fourth Proportional to 712,938.40, 1,069,407.60 and 665,699.20

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Solution

The fourth proportional to 712,938.40, 1,069,407.60 and 665,699.20 is: 998,548.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,938.40 : 1,069,407.60 = 665,699.20 : x
  2. Step 2: Convert to fraction form
    712,938.40/1,069,407.60 = 665,699.20/x
  3. Step 3: Cross multiply
    712,938.40x = 1,069,407.60 × 665,699.20
  4. Step 4: Simplify right side
    712,938.40x = 711,903,783,793.92
  5. Step 5: Solve for x
    x = 711,903,783,793.92/712,938.40
  6. Step 6: Final answer
    x = 998,548.80

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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.