Home / 1,030.50-1,545.84-261

Finding the Fourth Proportional to 1,030.50, 1,545.84 and 261

Calculator

Solution

The fourth proportional to 1,030.50, 1,545.84 and 261 is: 391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.50 : 1,545.84 = 261 : x
  2. Step 2: Convert to fraction form
    1,030.50/1,545.84 = 261/x
  3. Step 3: Cross multiply
    1,030.50x = 1,545.84 × 261
  4. Step 4: Simplify right side
    1,030.50x = 403,464.24
  5. Step 5: Solve for x
    x = 403,464.24/1,030.50
  6. Step 6: Final answer
    x = 391.52

Related Problems

Find fourth proportional to 515.25, 772.92 and 130.50
Half scale
Find fourth proportional to 2,061, 3,091.68 and 522
Double scale
Find fourth proportional to 1,031.50, 1,547.34 and 262
Similar ratio
Find fourth proportional to 1,545.75, 2,318.76 and 391.50
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.