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Finding the Fourth Proportional to 562,490.80, 776,218.12 and 320,851.60

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Solution

The fourth proportional to 562,490.80, 776,218.12 and 320,851.60 is: 442,764.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    562,490.80 : 776,218.12 = 320,851.60 : x
  2. Step 2: Convert to fraction form
    562,490.80/776,218.12 = 320,851.60/x
  3. Step 3: Cross multiply
    562,490.80x = 776,218.12 × 320,851.60
  4. Step 4: Simplify right side
    562,490.80x = 249,050,825,750.99
  5. Step 5: Solve for x
    x = 249,050,825,750.99/562,490.80
  6. Step 6: Final answer
    x = 442,764.27

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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.