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Finding the Fourth Proportional to 662,707.12, 914,492.28 and 390,761.84

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Solution

The fourth proportional to 662,707.12, 914,492.28 and 390,761.84 is: 539,225.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,707.12 : 914,492.28 = 390,761.84 : x
  2. Step 2: Convert to fraction form
    662,707.12/914,492.28 = 390,761.84/x
  3. Step 3: Cross multiply
    662,707.12x = 914,492.28 × 390,761.84
  4. Step 4: Simplify right side
    662,707.12x = 357,348,685,998.60
  5. Step 5: Solve for x
    x = 357,348,685,998.60/662,707.12
  6. Step 6: Final answer
    x = 539,225.66

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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.