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Finding the Fourth Proportional to 819,398.96, 1,130,780.56 and 475,314.56

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Solution

The fourth proportional to 819,398.96, 1,130,780.56 and 475,314.56 is: 655,939.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,398.96 : 1,130,780.56 = 475,314.56 : x
  2. Step 2: Convert to fraction form
    819,398.96/1,130,780.56 = 475,314.56/x
  3. Step 3: Cross multiply
    819,398.96x = 1,130,780.56 × 475,314.56
  4. Step 4: Simplify right side
    819,398.96x = 537,476,464,332.95
  5. Step 5: Solve for x
    x = 537,476,464,332.95/819,398.96
  6. Step 6: Final answer
    x = 655,939.89

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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.