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Finding the Fourth Proportional to 643,818.64, 888,463.20 and 357,341.20

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Solution

The fourth proportional to 643,818.64, 888,463.20 and 357,341.20 is: 493,127.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,818.64 : 888,463.20 = 357,341.20 : x
  2. Step 2: Convert to fraction form
    643,818.64/888,463.20 = 357,341.20/x
  3. Step 3: Cross multiply
    643,818.64x = 888,463.20 × 357,341.20
  4. Step 4: Simplify right side
    643,818.64x = 317,484,506,043.84
  5. Step 5: Solve for x
    x = 317,484,506,043.84/643,818.64
  6. Step 6: Final answer
    x = 493,127.24

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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.