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Finding the Fourth Proportional to 676,632.90, 933,852.87 and 390,097.02

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Solution

The fourth proportional to 676,632.90, 933,852.87 and 390,097.02 is: 538,391.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,632.90 : 933,852.87 = 390,097.02 : x
  2. Step 2: Convert to fraction form
    676,632.90/933,852.87 = 390,097.02/x
  3. Step 3: Cross multiply
    676,632.90x = 933,852.87 × 390,097.02
  4. Step 4: Simplify right side
    676,632.90x = 364,293,221,705.45
  5. Step 5: Solve for x
    x = 364,293,221,705.45/676,632.90
  6. Step 6: Final answer
    x = 538,391.23

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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.