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Finding the Fourth Proportional to 500,398.80, 690,484.02 and 285,526.08

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Solution

The fourth proportional to 500,398.80, 690,484.02 and 285,526.08 is: 393,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,398.80 : 690,484.02 = 285,526.08 : x
  2. Step 2: Convert to fraction form
    500,398.80/690,484.02 = 285,526.08/x
  3. Step 3: Cross multiply
    500,398.80x = 690,484.02 × 285,526.08
  4. Step 4: Simplify right side
    500,398.80x = 197,151,195,533.24
  5. Step 5: Solve for x
    x = 197,151,195,533.24/500,398.80
  6. Step 6: Final answer
    x = 393,988.15

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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.