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Finding the Fourth Proportional to 539,431.32, 805,045.26 and 479,645.76

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Solution

The fourth proportional to 539,431.32, 805,045.26 and 479,645.76 is: 715,821.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,431.32 : 805,045.26 = 479,645.76 : x
  2. Step 2: Convert to fraction form
    539,431.32/805,045.26 = 479,645.76/x
  3. Step 3: Cross multiply
    539,431.32x = 805,045.26 × 479,645.76
  4. Step 4: Simplify right side
    539,431.32x = 386,136,545,567.10
  5. Step 5: Solve for x
    x = 386,136,545,567.10/539,431.32
  6. Step 6: Final answer
    x = 715,821.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.