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Finding the Fourth Proportional to 703,914.80, 971,389.76 and 397,985.92

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Solution

The fourth proportional to 703,914.80, 971,389.76 and 397,985.92 is: 549,213.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,914.80 : 971,389.76 = 397,985.92 : x
  2. Step 2: Convert to fraction form
    703,914.80/971,389.76 = 397,985.92/x
  3. Step 3: Cross multiply
    703,914.80x = 971,389.76 × 397,985.92
  4. Step 4: Simplify right side
    703,914.80x = 386,599,447,312.18
  5. Step 5: Solve for x
    x = 386,599,447,312.18/703,914.80
  6. Step 6: Final answer
    x = 549,213.41

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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.