Home / 728,526.16-1,005,009.48-486,868.56

Finding the Fourth Proportional to 728,526.16, 1,005,009.48 and 486,868.56

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Solution

The fourth proportional to 728,526.16, 1,005,009.48 and 486,868.56 is: 671,640.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,526.16 : 1,005,009.48 = 486,868.56 : x
  2. Step 2: Convert to fraction form
    728,526.16/1,005,009.48 = 486,868.56/x
  3. Step 3: Cross multiply
    728,526.16x = 1,005,009.48 × 486,868.56
  4. Step 4: Simplify right side
    728,526.16x = 489,307,518,313.95
  5. Step 5: Solve for x
    x = 489,307,518,313.95/728,526.16
  6. Step 6: Final answer
    x = 671,640.29

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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.