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Finding the Fourth Proportional to 710,779.60, 980,861.37 and 388,492

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Solution

The fourth proportional to 710,779.60, 980,861.37 and 388,492 is: 536,111.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,779.60 : 980,861.37 = 388,492 : x
  2. Step 2: Convert to fraction form
    710,779.60/980,861.37 = 388,492/x
  3. Step 3: Cross multiply
    710,779.60x = 980,861.37 × 388,492
  4. Step 4: Simplify right side
    710,779.60x = 381,056,795,354.04
  5. Step 5: Solve for x
    x = 381,056,795,354.04/710,779.60
  6. Step 6: Final answer
    x = 536,111.05

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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.