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Finding the Fourth Proportional to 586,670.25, 809,605.28 and 318,398.25

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Solution

The fourth proportional to 586,670.25, 809,605.28 and 318,398.25 is: 439,389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,670.25 : 809,605.28 = 318,398.25 : x
  2. Step 2: Convert to fraction form
    586,670.25/809,605.28 = 318,398.25/x
  3. Step 3: Cross multiply
    586,670.25x = 809,605.28 × 318,398.25
  4. Step 4: Simplify right side
    586,670.25x = 257,776,904,342.76
  5. Step 5: Solve for x
    x = 257,776,904,342.76/586,670.25
  6. Step 6: Final answer
    x = 439,389.77

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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.