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Finding the Fourth Proportional to 692,990.30, 956,316.52 and 387,071.03

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Solution

The fourth proportional to 692,990.30, 956,316.52 and 387,071.03 is: 534,152.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,990.30 : 956,316.52 = 387,071.03 : x
  2. Step 2: Convert to fraction form
    692,990.30/956,316.52 = 387,071.03/x
  3. Step 3: Cross multiply
    692,990.30x = 956,316.52 × 387,071.03
  4. Step 4: Simplify right side
    692,990.30x = 370,162,423,277.05
  5. Step 5: Solve for x
    x = 370,162,423,277.05/692,990.30
  6. Step 6: Final answer
    x = 534,152.39

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Similar ratio
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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.