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Finding the Fourth Proportional to 662,352.61, 914,165.89 and 390,404.63

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Solution

The fourth proportional to 662,352.61, 914,165.89 and 390,404.63 is: 538,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,352.61 : 914,165.89 = 390,404.63 : x
  2. Step 2: Convert to fraction form
    662,352.61/914,165.89 = 390,404.63/x
  3. Step 3: Cross multiply
    662,352.61x = 914,165.89 × 390,404.63
  4. Step 4: Simplify right side
    662,352.61x = 356,894,596,044.07
  5. Step 5: Solve for x
    x = 356,894,596,044.07/662,352.61
  6. Step 6: Final answer
    x = 538,828.70

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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.