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Finding the Fourth Proportional to 696,522.80, 961,212.47 and 390,667.20

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Solution

The fourth proportional to 696,522.80, 961,212.47 and 390,667.20 is: 539,126.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,522.80 : 961,212.47 = 390,667.20 : x
  2. Step 2: Convert to fraction form
    696,522.80/961,212.47 = 390,667.20/x
  3. Step 3: Cross multiply
    696,522.80x = 961,212.47 × 390,667.20
  4. Step 4: Simplify right side
    696,522.80x = 375,514,182,306.65
  5. Step 5: Solve for x
    x = 375,514,182,306.65/696,522.80
  6. Step 6: Final answer
    x = 539,126.91

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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.