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Finding the Fourth Proportional to 724,671.90, 1,085,695.65 and 619,695.90

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Solution

The fourth proportional to 724,671.90, 1,085,695.65 and 619,695.90 is: 928,421.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,671.90 : 1,085,695.65 = 619,695.90 : x
  2. Step 2: Convert to fraction form
    724,671.90/1,085,695.65 = 619,695.90/x
  3. Step 3: Cross multiply
    724,671.90x = 1,085,695.65 × 619,695.90
  4. Step 4: Simplify right side
    724,671.90x = 672,801,142,952.84
  5. Step 5: Solve for x
    x = 672,801,142,952.84/724,671.90
  6. Step 6: Final answer
    x = 928,421.74

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1.5x scale

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.