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Finding the Fourth Proportional to 643,925.68, 888,572.98 and 357,423.24

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Solution

The fourth proportional to 643,925.68, 888,572.98 and 357,423.24 is: 493,219.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,925.68 : 888,572.98 = 357,423.24 : x
  2. Step 2: Convert to fraction form
    643,925.68/888,572.98 = 357,423.24/x
  3. Step 3: Cross multiply
    643,925.68x = 888,572.98 × 357,423.24
  4. Step 4: Simplify right side
    643,925.68x = 317,596,633,488.06
  5. Step 5: Solve for x
    x = 317,596,633,488.06/643,925.68
  6. Step 6: Final answer
    x = 493,219.39

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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.