Home / 747,356.69-1,031,385.08-420,690.79

Finding the Fourth Proportional to 747,356.69, 1,031,385.08 and 420,690.79

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Solution

The fourth proportional to 747,356.69, 1,031,385.08 and 420,690.79 is: 580,571.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,356.69 : 1,031,385.08 = 420,690.79 : x
  2. Step 2: Convert to fraction form
    747,356.69/1,031,385.08 = 420,690.79/x
  3. Step 3: Cross multiply
    747,356.69x = 1,031,385.08 × 420,690.79
  4. Step 4: Simplify right side
    747,356.69x = 433,894,199,417.50
  5. Step 5: Solve for x
    x = 433,894,199,417.50/747,356.69
  6. Step 6: Final answer
    x = 580,571.77

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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.