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Finding the Fourth Proportional to 662,955.17, 914,835.03 and 390,960.72

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Solution

The fourth proportional to 662,955.17, 914,835.03 and 390,960.72 is: 539,500.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,955.17 : 914,835.03 = 390,960.72 : x
  2. Step 2: Convert to fraction form
    662,955.17/914,835.03 = 390,960.72/x
  3. Step 3: Cross multiply
    662,955.17x = 914,835.03 × 390,960.72
  4. Step 4: Simplify right side
    662,955.17x = 357,664,562,010.02
  5. Step 5: Solve for x
    x = 357,664,562,010.02/662,955.17
  6. Step 6: Final answer
    x = 539,500.38

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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.