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Finding the Fourth Proportional to 261,085.68, 360,271.15 and 153,649.31

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Solution

The fourth proportional to 261,085.68, 360,271.15 and 153,649.31 is: 212,020.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,085.68 : 360,271.15 = 153,649.31 : x
  2. Step 2: Convert to fraction form
    261,085.68/360,271.15 = 153,649.31/x
  3. Step 3: Cross multiply
    261,085.68x = 360,271.15 × 153,649.31
  4. Step 4: Simplify right side
    261,085.68x = 55,355,411,424.93
  5. Step 5: Solve for x
    x = 55,355,411,424.93/261,085.68
  6. Step 6: Final answer
    x = 212,020.10

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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.