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Finding the Fourth Proportional to 662,351.61, 914,164.51 and 390,403.63

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Solution

The fourth proportional to 662,351.61, 914,164.51 and 390,403.63 is: 538,827.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,351.61 : 914,164.51 = 390,403.63 : x
  2. Step 2: Convert to fraction form
    662,351.61/914,164.51 = 390,403.63/x
  3. Step 3: Cross multiply
    662,351.61x = 914,164.51 × 390,403.63
  4. Step 4: Simplify right side
    662,351.61x = 356,893,143,121.17
  5. Step 5: Solve for x
    x = 356,893,143,121.17/662,351.61
  6. Step 6: Final answer
    x = 538,827.32

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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.