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Finding the Fourth Proportional to 261,400.64, 390,330.33 and 207,487.74

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Solution

The fourth proportional to 261,400.64, 390,330.33 and 207,487.74 is: 309,826.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,400.64 : 390,330.33 = 207,487.74 : x
  2. Step 2: Convert to fraction form
    261,400.64/390,330.33 = 207,487.74/x
  3. Step 3: Cross multiply
    261,400.64x = 390,330.33 × 207,487.74
  4. Step 4: Simplify right side
    261,400.64x = 80,988,758,710.81
  5. Step 5: Solve for x
    x = 80,988,758,710.81/261,400.64
  6. Step 6: Final answer
    x = 309,826.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.