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Finding the Fourth Proportional to 696,146.33, 960,740.70 and 390,217.84

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Solution

The fourth proportional to 696,146.33, 960,740.70 and 390,217.84 is: 538,533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,146.33 : 960,740.70 = 390,217.84 : x
  2. Step 2: Convert to fraction form
    696,146.33/960,740.70 = 390,217.84/x
  3. Step 3: Cross multiply
    696,146.33x = 960,740.70 × 390,217.84
  4. Step 4: Simplify right side
    696,146.33x = 374,898,156,888.92
  5. Step 5: Solve for x
    x = 374,898,156,888.92/696,146.33
  6. Step 6: Final answer
    x = 538,533.55

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Double scale
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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.