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Finding the Fourth Proportional to 509,298.23, 702,831.36 and 279,870.30

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Solution

The fourth proportional to 509,298.23, 702,831.36 and 279,870.30 is: 386,220.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,298.23 : 702,831.36 = 279,870.30 : x
  2. Step 2: Convert to fraction form
    509,298.23/702,831.36 = 279,870.30/x
  3. Step 3: Cross multiply
    509,298.23x = 702,831.36 × 279,870.30
  4. Step 4: Simplify right side
    509,298.23x = 196,701,623,572.61
  5. Step 5: Solve for x
    x = 196,701,623,572.61/509,298.23
  6. Step 6: Final answer
    x = 386,220.91

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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.