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Finding the Fourth Proportional to 710,780.34, 980,862.40 and 388,492.75

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Solution

The fourth proportional to 710,780.34, 980,862.40 and 388,492.75 is: 536,112.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,780.34 : 980,862.40 = 388,492.75 : x
  2. Step 2: Convert to fraction form
    710,780.34/980,862.40 = 388,492.75/x
  3. Step 3: Cross multiply
    710,780.34x = 980,862.40 × 388,492.75
  4. Step 4: Simplify right side
    710,780.34x = 381,057,931,147.60
  5. Step 5: Solve for x
    x = 381,057,931,147.60/710,780.34
  6. Step 6: Final answer
    x = 536,112.09

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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.