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Finding the Fourth Proportional to 611,886.60, 917,246.70 and 476,875.80

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Solution

The fourth proportional to 611,886.60, 917,246.70 and 476,875.80 is: 714,859.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,886.60 : 917,246.70 = 476,875.80 : x
  2. Step 2: Convert to fraction form
    611,886.60/917,246.70 = 476,875.80/x
  3. Step 3: Cross multiply
    611,886.60x = 917,246.70 × 476,875.80
  4. Step 4: Simplify right side
    611,886.60x = 437,412,753,859.86
  5. Step 5: Solve for x
    x = 437,412,753,859.86/611,886.60
  6. Step 6: Final answer
    x = 714,859.18

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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.