Home / 749,465.29-1,123,643.89-389,118.77

Finding the Fourth Proportional to 749,465.29, 1,123,643.89 and 389,118.77

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Solution

The fourth proportional to 749,465.29, 1,123,643.89 and 389,118.77 is: 583,390.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    749,465.29 : 1,123,643.89 = 389,118.77 : x
  2. Step 2: Convert to fraction form
    749,465.29/1,123,643.89 = 389,118.77/x
  3. Step 3: Cross multiply
    749,465.29x = 1,123,643.89 × 389,118.77
  4. Step 4: Simplify right side
    749,465.29x = 437,230,921,803.80
  5. Step 5: Solve for x
    x = 437,230,921,803.80/749,465.29
  6. Step 6: Final answer
    x = 583,390.49

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Double scale
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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.