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Finding the Fourth Proportional to 662,783.92, 914,760.88 and 390,835.52

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Solution

The fourth proportional to 662,783.92, 914,760.88 and 390,835.52 is: 539,423.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,783.92 : 914,760.88 = 390,835.52 : x
  2. Step 2: Convert to fraction form
    662,783.92/914,760.88 = 390,835.52/x
  3. Step 3: Cross multiply
    662,783.92x = 914,760.88 × 390,835.52
  4. Step 4: Simplify right side
    662,783.92x = 357,521,044,210.46
  5. Step 5: Solve for x
    x = 357,521,044,210.46/662,783.92
  6. Step 6: Final answer
    x = 539,423.23

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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.