Home / 659,264.76-909,933.90-387,420

Finding the Fourth Proportional to 659,264.76, 909,933.90 and 387,420

Calculator

Solution

The fourth proportional to 659,264.76, 909,933.90 and 387,420 is: 534,726.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,264.76 : 909,933.90 = 387,420 : x
  2. Step 2: Convert to fraction form
    659,264.76/909,933.90 = 387,420/x
  3. Step 3: Cross multiply
    659,264.76x = 909,933.90 × 387,420
  4. Step 4: Simplify right side
    659,264.76x = 352,526,591,538
  5. Step 5: Solve for x
    x = 352,526,591,538/659,264.76
  6. Step 6: Final answer
    x = 534,726.89

Related Problems

Find fourth proportional to 329,632.38, 454,966.95 and 193,710
Half scale
Find fourth proportional to 1,318,529.52, 1,819,867.80 and 774,840
Double scale
Find fourth proportional to 659,265.76, 909,935.28 and 387,421
Similar ratio
Find fourth proportional to 988,897.14, 1,364,900.85 and 581,130
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.