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Finding the Fourth Proportional to 458,443.80, 687,665.70 and 340,345.80

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Solution

The fourth proportional to 458,443.80, 687,665.70 and 340,345.80 is: 510,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,443.80 : 687,665.70 = 340,345.80 : x
  2. Step 2: Convert to fraction form
    458,443.80/687,665.70 = 340,345.80/x
  3. Step 3: Cross multiply
    458,443.80x = 687,665.70 × 340,345.80
  4. Step 4: Simplify right side
    458,443.80x = 234,044,132,799.06
  5. Step 5: Solve for x
    x = 234,044,132,799.06/458,443.80
  6. Step 6: Final answer
    x = 510,518.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.