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Finding the Fourth Proportional to 696,109.55, 960,675.58 and 390,186.01

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Solution

The fourth proportional to 696,109.55, 960,675.58 and 390,186.01 is: 538,481.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,109.55 : 960,675.58 = 390,186.01 : x
  2. Step 2: Convert to fraction form
    696,109.55/960,675.58 = 390,186.01/x
  3. Step 3: Cross multiply
    696,109.55x = 960,675.58 × 390,186.01
  4. Step 4: Simplify right side
    696,109.55x = 374,842,169,513.71
  5. Step 5: Solve for x
    x = 374,842,169,513.71/696,109.55
  6. Step 6: Final answer
    x = 538,481.58

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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.