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Finding the Fourth Proportional to 570,139.58, 786,808.95 and 315,514.46

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Solution

The fourth proportional to 570,139.58, 786,808.95 and 315,514.46 is: 435,418.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,139.58 : 786,808.95 = 315,514.46 : x
  2. Step 2: Convert to fraction form
    570,139.58/786,808.95 = 315,514.46/x
  3. Step 3: Cross multiply
    570,139.58x = 786,808.95 × 315,514.46
  4. Step 4: Simplify right side
    570,139.58x = 248,249,600,982.42
  5. Step 5: Solve for x
    x = 248,249,600,982.42/570,139.58
  6. Step 6: Final answer
    x = 435,418.99

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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.