Home / 991,861.80-1,487,792.70-518,692.20

Finding the Fourth Proportional to 991,861.80, 1,487,792.70 and 518,692.20

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Solution

The fourth proportional to 991,861.80, 1,487,792.70 and 518,692.20 is: 778,038.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,861.80 : 1,487,792.70 = 518,692.20 : x
  2. Step 2: Convert to fraction form
    991,861.80/1,487,792.70 = 518,692.20/x
  3. Step 3: Cross multiply
    991,861.80x = 1,487,792.70 × 518,692.20
  4. Step 4: Simplify right side
    991,861.80x = 771,706,468,706.94
  5. Step 5: Solve for x
    x = 771,706,468,706.94/991,861.80
  6. Step 6: Final answer
    x = 778,038.30

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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.