Home / 500,254.60-690,420.19-306,778

Finding the Fourth Proportional to 500,254.60, 690,420.19 and 306,778

Calculator

Solution

The fourth proportional to 500,254.60, 690,420.19 and 306,778 is: 423,395.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,254.60 : 690,420.19 = 306,778 : x
  2. Step 2: Convert to fraction form
    500,254.60/690,420.19 = 306,778/x
  3. Step 3: Cross multiply
    500,254.60x = 690,420.19 × 306,778
  4. Step 4: Simplify right side
    500,254.60x = 211,805,725,047.82
  5. Step 5: Solve for x
    x = 211,805,725,047.82/500,254.60
  6. Step 6: Final answer
    x = 423,395.86

Related Problems

Find fourth proportional to 250,127.30, 345,210.10 and 153,389
Half scale
Find fourth proportional to 1,000,509.20, 1,380,840.38 and 613,556
Double scale
Find fourth proportional to 500,255.60, 690,421.57 and 306,779
Similar ratio
Find fourth proportional to 750,381.90, 1,035,630.29 and 460,167
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.