Home / 931,530.40-1,398,985.20-815,408.80

Finding the Fourth Proportional to 931,530.40, 1,398,985.20 and 815,408.80

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Solution

The fourth proportional to 931,530.40, 1,398,985.20 and 815,408.80 is: 1,224,592.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,530.40 : 1,398,985.20 = 815,408.80 : x
  2. Step 2: Convert to fraction form
    931,530.40/1,398,985.20 = 815,408.80/x
  3. Step 3: Cross multiply
    931,530.40x = 1,398,985.20 × 815,408.80
  4. Step 4: Simplify right side
    931,530.40x = 1,140,744,843,149.76
  5. Step 5: Solve for x
    x = 1,140,744,843,149.76/931,530.40
  6. Step 6: Final answer
    x = 1,224,592.18

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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.