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Finding the Fourth Proportional to 715,595.19, 987,527.53 and 393,312.79

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Solution

The fourth proportional to 715,595.19, 987,527.53 and 393,312.79 is: 542,775.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,595.19 : 987,527.53 = 393,312.79 : x
  2. Step 2: Convert to fraction form
    715,595.19/987,527.53 = 393,312.79/x
  3. Step 3: Cross multiply
    715,595.19x = 987,527.53 × 393,312.79
  4. Step 4: Simplify right side
    715,595.19x = 388,407,208,026.11
  5. Step 5: Solve for x
    x = 388,407,208,026.11/715,595.19
  6. Step 6: Final answer
    x = 542,775.04

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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.